Double-lane strip type triangular coal mining method
阅读说明：本技术 一种双巷条带式三角煤开采方法 (Double-lane strip type triangular coal mining method ) 是由 郑忠友 朱磊 吴玉意 张新福 黄剑斌 古文哲 潘浩 秋丰岐 宋天奇 刘治成 赵萌 于 2020-06-03 设计创作，主要内容包括：本发明公开了一种双巷条带式三角煤开采方法,包括步骤：先掘进进风导巷,再掘进回风导巷,然后掘进通风联巷将进风导巷和回风导巷联通形成全风压通风系统；在进风导巷开口掘进双巷条带并与回风导巷贯通；撤出双巷条带内所有机械、机电等设备后,在双巷条带与进风导巷和回风导巷相交处6m范围内建立密闭墙,完成采后封闭；依次循环掘进2#、3#、4#、5#、6#.....n#条带,直至三角煤区域煤炭全部采完。本发明首先沿三角煤区域边界掘进外围导巷,形成全风压通风系统后,再进行双巷条带回采,能够解决形状不规则的三角煤区域煤炭资源高效开采问题。本发明可广泛应用于煤矿、冶金矿山等领域。(The invention discloses a double-lane strip type triangular coal mining method, which comprises the following steps: firstly tunneling an air inlet guide lane, then tunneling an air return guide lane, and then tunneling a ventilation connection lane to connect the air inlet guide lane and the air return guide lane to form a full-air-pressure ventilation system; tunneling double-lane strips at the opening of the air inlet guide lane and communicating with the air return guide lane; after all mechanical, electromechanical and other equipment in the double-lane strip is removed, a sealing wall is built in the range of 6m at the intersection of the double-lane strip and the air inlet guide lane and the air return guide lane, and sealing after mining is finished; and (4) circularly tunneling 2#, 3#, 4#, 5#, and 6#. n # strips in sequence until all the coals in the triangular coal area are mined. According to the invention, the peripheral guide roadway is firstly tunneled along the boundary of the triangular coal area to form the full-wind-pressure ventilation system, and then the double-roadway strip mining is carried out, so that the problem of high-efficiency mining of the coal resources in the triangular coal area with an irregular shape can be solved. The invention can be widely applied to the fields of coal mines, metallurgical mines and the like.)
1. A double-lane strip type triangular coal mining method is characterized in that firstly, a peripheral guide lane is tunneled along the boundary of a triangular coal area to form a working face of a full-wind-pressure ventilation system, and the triangular coal mining is arranged by double-lane strips, and specifically comprises the following steps:
1) firstly, tunneling an air inlet guide lane (1), then tunneling an air return guide lane (2), and then tunneling a ventilation connecting lane (3) to connect the air inlet guide lane (1) and the air return guide lane (2) to form a full-air-pressure ventilation system;
2) tunneling a double-lane strip 1# (5) at the opening of the air inlet guide lane (1);
3) continuously tunneling a double-lane strip 1# (5) until the double-lane strip is communicated with the return air guide lane (2);
4) withdrawing all mechanical and electromechanical equipment in the double-lane strip 1# (5), and establishing a sealing wall (11) in the range of 6m at the intersection of the double-lane strip 1# (5) and the air inlet guide lane (1) and the air return guide lane (2) to finish sealing after mining;
5) and (3) tunneling a double-lane strip 2# (6), closing the double-lane strip 2# (6) after tunneling, and circularly tunneling a double-lane strip 3# (7), a double-lane strip 4# (8), a double-lane strip 5# (9), a double-lane strip 6# (10), a.
2. The mining method of the double-lane strip type triangular coal, according to claim 1, is characterized in that each group of double-lane strips are respectively pressed and ventilated through two local ventilators so as to improve the air flow field environment of a mining lane.
3. The mining method of the double-lane strip type triangular coal according to claim 1, characterized in that each group of double-lane strips is divided into a strip main lane (6-1), a strip auxiliary lane (6-2) and a strip connecting lane (6-3) therebetween, the tunneling height, the width and the supporting mode of the lanes are the same, and a coal pillar (4) with a set width is reserved between the strip main lane (6-1) and the strip auxiliary lane (6-2), and the width of the coal pillar is 1.5-3 times of the width of the main lane.
4. The mining method of the double-lane strip type triangular coal as claimed in claim 3, wherein the strip connecting lanes (6-3) are arranged at intervals of a set distance between the double-lane strips, so that the shunting of equipment is facilitated, and the orderly operation is ensured.
5. The mining method of the double-lane strip type triangle coal as claimed in claim 3, characterized in that a continuous miner (12) is arranged in the double-lane strip to cut coal, a rear shuttle car (13) carries the coal for a long distance, a crawler-type transfer crusher (14) breaks the coal to transfer, the continuous miner (12) and the shuttle car (13) are withdrawn, a four-arm bolting machine (15) follows a roadway support, and an explosion-proof shovel car (16) cleans the coal to finish mining.
6. The mining method of the double-lane strip type triangular coal, according to claim 5, is characterized by comprising the following construction steps:
a) measuring at the road junction of the excavated tunnel, placing a vertical line point, adjusting laser, and determining the width, height and direction of the excavated tunnel;
b) starting a continuous miner (12) to enter a main strip roadway (6-1) for coal cutting, conveying coal into a shuttle car (13) behind the continuous miner by the continuous miner (12) through a self-carrying conveyor of a unit, conveying the shuttle car (13) to a crawler type transfer crusher (14) for unloading after the shuttle car (13) is full of coal, crushing the coal by the crawler type transfer crusher (14), transferring the crushed coal to a belt conveyor (17), and conveying the coal to a main coal flow conveying system of a mine by the belt conveyor (17); the coal cutting of the continuous miner (12) is carried out for 10-15 m, the coal is retreated to enter the auxiliary roadway for coal cutting, and the shuttle car (13) follows;
c) after the continuous miner (12) exits from the main roadway, the four-arm anchor rod machine (15) enters the main roadway to support a roadway top plate, and after the support is completed, the explosion-proof forklift (16) follows to clean coal;
d) the continuous miner (12) cuts coal in the auxiliary roadway for 10-15 m and then enters the main roadway for coal cutting, and the shuttle car (13) follows;
e) the four-arm anchor rod machine (15) enters the auxiliary roadway for supporting after the main roadway is supported, and the explosion-proof forklift (16) follows to clean coal after the supporting is finished;
f) the operation is sequentially circulated, the alternate parallel operation of coal cutting and supporting is realized, a strip connecting roadway (6-3) is tunneled to the main roadway after the continuous miner (12) tunnels 40-50 m from the auxiliary roadway, and the strip connecting roadway (6-3) can facilitate the dispatching of equipment between the strip main roadway (6-1) and the strip auxiliary roadway (6-2);
g) and continuously and circularly tunneling until the strip main lane (6-1) and the strip auxiliary lane (6-2) are communicated with the return air guide lane, and sealing the strip main lane (6-1) and the strip auxiliary lane (6-2) after the strip main lane (6-1) and the strip auxiliary lane are communicated.
Technical Field
The invention belongs to the technical field of underground coal mining, and particularly relates to a double-lane strip type triangular coal mining method.
Background
The triangular coal is also called as corner coal, is a part formed by being influenced by geological conditions, well field boundaries, various protective coal pillars and the like in the process of mining, and has the characteristics of small reserve, irregular shape, large pressure and the like. With the continuous improvement of equipment technology, the production capacity of coal mines is gradually enlarged, the service life is relatively shortened, and many mines are considering how to scientifically and reasonably mine the triangular coal. The traditional triangular coal mining modes comprise a slope adjusting mining mode, a room and pillar type mining mode, a Wanggervey method mining mode and the like. The slope-adjusting mining is suitable for mining under the condition that a working face cut hole and two roadways of the working face form a certain included angle, and the triangular coal area adopting the slope-adjusting mining is regular in shape and is not suitable for the triangular coal area with an irregular shape. The room and pillar type mining method and the Wangeviry mining method are single lane tunneling, coal cutting and supporting cannot work in parallel, the ventilation condition is poor, multiple heads are connected in series for ventilation, and the mining efficiency is low, so that the traditional triangular coal mining method is not suitable for efficient mining of triangular coal zone coal beds with irregular shapes.
Disclosure of Invention
In order to solve the problems, the invention provides a double-lane strip type triangular coal mining method.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
a double-lane strip type triangular coal mining method comprises the following steps of firstly, tunneling a peripheral guide lane along the boundary of a triangular coal area to form a working face of a full-wind-pressure ventilation system, wherein the triangular coal mining is arranged in double-lane strips:
1) firstly tunneling an air inlet guide lane, then tunneling an air return guide lane, and then tunneling a ventilation connection lane to connect the air inlet guide lane and the air return guide lane to form a full-air-pressure ventilation system;
2) tunneling a double-lane strip 1# at the opening of the air inlet guide lane;
3) continuously tunneling the double-lane strip 1# until the double-lane strip is communicated with the return air guide lane;
4) withdrawing all mechanical and electromechanical equipment in the double-lane strip 1#, and establishing a sealing wall in the range of 6m at the intersection of the double-lane strip 1#, the air inlet guide lane and the air return guide lane to finish sealing after mining;
5) and (3) tunneling a double-
The invention is further improved in that each group of double-lane strips are respectively pressed in and ventilated through two local ventilators so as to improve the air flow field environment of the mining lane.
The invention has the further improvement that each group of double-lane strips is divided into a strip main lane, a strip auxiliary lane and strip connection lanes between the strip main lane and the strip auxiliary lane, the tunneling height, the tunneling width and the supporting mode of the lanes are the same, and coal pillars with set width are reserved between the strip main lane and the strip auxiliary lane, and the width of the coal pillars is 1.5-3 times of the width of the main lane.
The invention has the further improvement that the strip connecting lanes are arranged at intervals of set distance between the strips of the double lanes, thereby facilitating the shunting of equipment and ensuring the orderly operation.
The invention further improves the method that a continuous coal mining machine is arranged in the double-lane strip for coal cutting, a shuttle car at the rear carries coal for a long distance, a crawler-type transfer crusher breaks the coal for transfer, the continuous coal mining machine and the shuttle car are withdrawn, a four-arm bolting machine follows the tunnel for supporting, and an explosion-proof forklift cleans the coal to complete mining.
The invention has the further improvement that the double-lane strip mining comprises the following construction steps:
a) measuring at the road junction of the excavated tunnel, placing a vertical line point, adjusting laser, and determining the width, height and direction of the excavated tunnel;
b) starting a continuous coal mining machine to enter a main strip roadway for coal cutting, conveying coal into a shuttle car behind the continuous coal mining machine through a self-carrying conveyor of a unit, conveying the shuttle car to a crawler type transfer crusher after the shuttle car is full of the coal for unloading, transferring the crushed coal to a belt conveyor by the crawler type transfer crusher, and conveying the coal to a main coal flow conveying system of a mine by the belt conveyor; the coal cut by the continuous miner is withdrawn by 10-15 m and enters the auxiliary roadway for coal cutting, and the shuttle car follows;
c) after the continuous coal mining machine exits from the main roadway, the four-arm roof bolter enters the main roadway to support a roadway roof, and after the support is completed, the explosion-proof forklift follows to clean coal;
d) the continuous miner cuts coal in the auxiliary roadway for 10-15 m and then enters the main roadway for coal cutting, and the shuttle car follows;
e) the four-arm anchor rod machine enters the auxiliary roadway for supporting after the main roadway is supported, and the explosion-proof forklift follows up to clean coal after the supporting is finished;
f) sequentially circulating to realize alternate parallel operation of coal cutting and supporting, and excavating a strip connection roadway into a main roadway after a continuous coal mining machine excavates 40-50 m in an auxiliary roadway, wherein the strip connection roadway can facilitate the dispatching of equipment between the strip main roadway and the strip auxiliary roadway;
g) and continuing to circularly tunnel until the strip main lane and the strip auxiliary lane are communicated with the return air guide lane, and sealing the strip main lane and the strip auxiliary lane after the strip main lane and the strip auxiliary lane are communicated.
The invention has the following beneficial technical effects:
according to the double-lane strip type triangular coal mining method, firstly, the peripheral guide lane is tunneled along the boundary of the triangular coal area to form the full-wind-pressure ventilation system, then double-lane strip mining is carried out, and the problem of efficient mining of the triangular coal area coal resources with irregular shapes can be solved.
Furthermore, the invention adopts the light-weight continuous coal mining machine for double-lane mining, the rear shuttle car and the crawler-type transfer crusher are matched for transportation, the strip is tunneled to facilitate timely shunting, all the devices are flexible in maneuvering and high in mechanization degree, the coal cutting and supporting are alternately operated in parallel, and the mining efficiency of the coal resources in the triangular coal area is greatly increased.
In addition, the invention can be widely applied to the fields of coal mines, metallurgical mines and the like.
Drawings
FIG. 1 is a schematic plan view of a triangular coal section dual roadway strip mining.
Fig. 2 is a schematic cross-sectional view of a triangular coal area dual roadway strip mining.
Fig. 3 is a schematic diagram of the tunneling operation in the 2# double-lane strip mining.
Description of reference numerals:
1-air intake guide lane; 2, returning air to guide the lane; 3, ventilation connecting lane; 4-coal pillar; 5-double lane stripe 1 #; 6-
Detailed Description
In order to make the technical means, creation features, achievement purposes and effects of the invention easy to understand, the technical scheme will be clearly and completely described below by combining the triangular coal mining application example with the accompanying drawings of the invention.
The elm bay coal mine is located in the middle of a first-stage planning area of an elm maglev mining area, a No. 2 coal seam is mainly mined, the coal thickness is average 11.79m, and the whole area can be mined. Triangular coal zones are formed due to the face and field boundaries. The north boundary and the east boundary of the triangular coal are the well field boundaries of the mine, and the triangular coal has large reserves and is in a trapezoidal irregular shape. In order to meet the requirements of safety, convenience and high efficiency, the triangular coal is mined by adopting double-lane strips.
Referring to fig. 1, 2 and 3, the specific embodiment is as follows:
1) firstly tunneling an air inlet guide lane 1, then tunneling a return
2) And (3) excavating a double-
3) The continuous miner 12 is started to enter the strip main roadway 6-1 for coal cutting, the continuous miner 12 conveys coal into a shuttle car 13 behind the continuous miner 12 through a self-carrying conveyor of the unit, the shuttle car 13 is conveyed to a crawler type transfer crusher 14 for unloading after being full of coal, the crawler type transfer crusher 14 transfers the crushed coal to a belt conveyor 17, and the belt conveyor 17 conveys the coal to a main coal flow conveying system of the mine. And (3) retreating the continuous miner 12 after 10-15 m of coal cutting into the auxiliary roadway 6-2 for coal cutting, and enabling the shuttle car 13 to follow.
4) After the continuous miner 12 exits the main roadway 6-1, the four-arm roof bolter 15 enters the main roadway 6-1 to support the roadway roof, and after the support is completed, the explosion-proof forklift 16 follows to clean coal.
5) The continuous miner 12 cuts coal 10-15 m in the auxiliary roadway 6-2 and then enters the main roadway 6-1 to cut coal, and the shuttle car 13 follows.
6) And the four-arm anchor rod machine 15 enters the auxiliary roadway 6-2 for supporting after the main roadway is supported, and the explosion-proof forklift 16 follows up for coal cleaning after the supporting is finished.
7) And sequentially circulating to realize alternate parallel operation of coal cutting and supporting, and tunneling a strip connection lane 6-3 to the main lane after 40-50 m of tunneling by the continuous miner 12 in the auxiliary lane 6-2, wherein the strip connection lane 6-3 can facilitate the scheduling of equipment between the strip main lane and the strip auxiliary lane.
8) And after the double-