阅读说明：本技术 一种巷道临时支护新工艺 (novel process for temporary support of roadway ) 是由 魏垂胜 张学景 张红军 刘二层 于 2019-09-12 设计创作，主要内容包括：本发明公开了一种巷道临时支护新工艺,首先进行敲帮问顶,在巷道前两排顶部安装吊环,将两张网使用铁丝连接并连接至巷道正中顶板网上,并使用撑杆撑起,将前探梁依次穿过两个吊环及两个铁背板,铁背板位置调整至均匀布置在永久支护前面的前探梁上时对铁背板进行闭锁；调整吊环插销位置以固定前探梁和铁背板,使用铁丝连网至未临时支护区域后方前端的永久支护网上,并使用撑杆撑起网,重复上述步骤对其余未临时支护区域进行临时支护,检查支护效果,对支护不紧和不实的铁背板及前探梁使用木楔楔紧,最后对迎面墙及两侧帮部裸露岩石使用网进行防护。本发明可使巷道临时支护施工效率大大提高,使总临时支护安装时长控制在15分钟之内。(the invention discloses a new temporary roadway support process, which comprises the steps of firstly knocking the upper and asking the top, mounting lifting rings at the tops of the front two rows of the roadway, connecting two nets by using iron wires and connecting the two nets to a top plate net in the middle of the roadway, supporting by using a support rod, sequentially penetrating a front canopy through the two lifting rings and two iron back plates, and locking the iron back plates when the positions of the iron back plates are adjusted to be uniformly distributed on the front canopy in front of a permanent support; adjusting the bolt position of the lifting ring to fix the front canopy and the iron back plate, connecting the net to a permanent support net at the front end behind the non-temporary support area by using an iron wire, supporting the net by using a support rod, repeating the steps to temporarily support the rest non-temporary support areas, checking the support effect, wedging the iron back plate and the front canopy which are not tightly and solidly supported by using wood wedges, and finally protecting the exposed rocks of the head-on wall and the two side walls by using nets. The invention can greatly improve the construction efficiency of the temporary support of the roadway and control the installation time of the total temporary support within 15 minutes.)

1. A new roadway temporary support technology is characterized by comprising the following steps:

(1) After the tunneling working face tunnels forwards, knocking the help and asking the top on the premise of ensuring safety;

(2) installing lifting rings on permanent support anchor rods at the tops of the front two rows of the roadway;

(3) Connecting the 2 nets to a top plate net in the center of the roadway by using iron wires, and supporting the connected 2 nets by using support rods for lapping;

(4) sequentially enabling a front canopy to pass through a front lifting ring, a rear lifting ring and two iron back plates, wherein the rear connecting line of a paved area is parallel to the tunneling direction of a roadway, adjusting the positions of the iron back plates while passing through the front canopy, and locking the iron back plates when the positions of the iron back plates are adjusted to be uniformly distributed on the front canopy in front of a permanent support;

(5) adjusting the position of a bolt of the lifting ring to fix the front cantilever and the iron back plate;

(6) Connecting the net to a permanent support net at the front end behind the non-temporary support area by using an iron wire, and supporting the net by using a support rod;

(7) Performing temporary support on the rest regions which are not temporarily supported in the same steps (4) and (5);

(8) Checking the supporting effect, and wedging the loosely and loosely supported iron back plate and the front canopy by using a wood wedge;

(9) and protecting the exposed rocks of the head-on wall and the side wall parts at the two sides by using the net.

2. The new process for roadway temporary support according to claim 1, characterized in that: the meshes are rectangular meshes and have the size of 1000 multiplied by 2000 mm.

3. the new process for roadway temporary support according to claim 1, characterized in that: the long edges of two meshes laid in the center of the roadway are connected, and the connecting lines need to be superposed with the central line of the roadway.

4. The new process for roadway temporary support according to claim 1, characterized in that: the length of the front cantilever is 3500mm-4200 mm.

5. the new process for roadway temporary support according to claim 1, characterized in that: the iron back plate needs to have the length not less than 1000mm, the width not less than 100mm, the thickness not less than 8mm and the radian not less than 3 m.

6. The new process for roadway temporary support according to claim 1, characterized in that: and iron back plates on the adjacent forepoling beams are installed in a staggered mode.

7. The new process for roadway temporary support according to claim 1, characterized in that: a front canopy sleeve with the inner diameter slightly larger than the outer diameter of a front canopy is welded on the arc-shaped inner side of the iron back plate, and a locking device is formed on the side face of the front canopy sleeve by welding a nut and matching with a bolt and a handle welded on the bolt.

8. the new process for roadway temporary support according to claim 1, characterized in that: when the width of the roadway is 3m or below 3m, the number of used front canopy is not less than 3; when the width of the roadway is n-n +1 m, the number of the used forepoling beams is not less than the odd number of n and n + 1.

Technical Field

The invention relates to the field of underground support of coal mines, in particular to a novel temporary support process for a roadway.

background

as shown in fig. 1-3, the current coal mine underground roadway forward-exploring temporary support process comprises the following steps: firstly, knocking the upper and asking the top; secondly, installing the hoisting rings 2 on the front two rows of permanent support anchor rods; thirdly, using a support rod to pave and connect the net to a permanent support net; fourthly, penetrating the front canopy 1; fifthly, people stand under permanent support or reliable temporary support and back-mount the wooden back plates 4 row by row; sixthly, adjusting the position of the bolt to fasten the forepoling beam 1 and the wood back plate 4; seventhly, checking the supporting effect, and wedging the support which is not solid and not tight by using a wood wedge; and eighthly, protecting the facing wall and the two sides.

As shown in fig. 1-3, the forestope adopted in the current supporting technology is processed by 2 inches of seamless steel pipe, the wall thickness of the pipe wall is not less than 4mm, and the length of the forestope is not less than 3.5 m; the lifting ring is processed into a closed shape by adopting flat iron with the thickness of 6mm, holes with the diameter phi of 20 are drilled at the two sides at intervals of 50mm, the bolt is processed and manufactured by using a steel bar with the diameter phi of 18, and M24 nuts are welded on the inner sides of the two ends; the wood back plate adopts 30X 150X 120mm or other dimensions.

The prior supporting process has the following problems:

1. the temporary support time is long, and each temporary support needs 40-60 minutes;

2. the temporary supporting process is unsafe, and people can easily enter the space below the empty roof, so that the phenomenon that the waste rocks injure the people is easily caused;

3. The temporary supporting effect is poor, and the conditions of loosening of the wood back plate, falling of the wood back plate and the like are easy to occur;

4. the wood is easy to decay, the consumption is large, and the investment cost is high.

disclosure of Invention

in order to solve the problems, the invention provides a new temporary roadway supporting process, which adopts an iron back plate to replace a wood back plate, enhances the strength of the back plate, and improves the supporting reliability by adding a locking device on the back plate.

The technical scheme adopted by the invention is as follows: a new roadway temporary support process comprises the following steps:

(1) After the tunneling working face tunnels forwards, knocking the help and asking the top on the premise of ensuring safety;

(2) Installing lifting rings on permanent support anchor rods at the tops of the front two rows of the roadway;

(3) Connecting the two nets to a top plate net in the center of the roadway by using iron wires, and supporting the connected two nets by using a support rod to lay nets;

(4) Sequentially enabling a front canopy to pass through a front lifting ring, a rear lifting ring and two iron back plates, wherein the rear connecting line of a paved area is parallel to the tunneling direction of a roadway, adjusting the positions of the iron back plates while passing through the front canopy, and locking the iron back plates when the positions of the iron back plates are adjusted to be uniformly distributed on the front canopy in front of a permanent support;

(5) Adjusting the position of a bolt of the lifting ring to fix the front cantilever and the iron back plate;

(6) Connecting the net to a permanent support net at the front end behind the non-temporary support area by using an iron wire, and supporting the net by using a support rod;

(7) Performing temporary support on the rest regions which are not temporarily supported in the same steps (4) and (5);

(8) checking the supporting effect, and wedging the loosely and loosely supported iron back plate and the front canopy by using a wood wedge;

(9) And protecting the exposed rocks of the head-on wall and the side wall parts at the two sides by using the net.

Furthermore, the meshes are rectangular meshes and have the size of 1000 multiplied by 2000 mm.

furthermore, the long edges of the two nets laid in the center of the roadway are connected, and the connecting lines need to be superposed with the central line of the roadway.

Further, the length of the front cantilever is 3500mm-4200 mm.

Further, the iron back plate needs to have the length not less than 1000mm, the width not less than 100mm, the thickness not less than 8mm and the radian with the radius not less than 3 m.

Further, the iron back plates on the adjacent forepoling beams are installed in a staggered mode.

Furthermore, a front cantilever sleeve with the inner diameter slightly larger than the outer diameter of the front cantilever is welded on the arc-shaped inner side of the iron back plate, and a locking device is formed on the side face of the front cantilever sleeve by welding a nut and matching with a bolt and a handle welded on the bolt.

Further, when the width of the roadway is 3m or below 3m, the number of used front canopy is not less than 3; when the width of the roadway is n-n +1 m, the number of the used forepoling beams is not less than the odd number of n and n + 1.

The invention has the following beneficial effects:

1. The total temporary support time is controlled within 15 minutes, which is 1/3 of the original temporary support time, so that a large amount of time is saved, and the work efficiency is improved;

2. The lower back plate is not required to be stood by personnel in the temporary supporting process, the safety management effect in the temporary supporting process is improved, meanwhile, the iron back plate is high in strength and reliable in effect after temporary supporting, and the safety risks such as falling of the iron back plate and the like do not exist;

3. The iron back plate is made of waste steel (such as a waste steel shed connecting plate), and is permanently used once, so that the investment of wood is reduced, and the investment cost is greatly reduced.

Drawings

fig. 1 is a sectional view of a roadway in a conventional roadway support structure;

fig. 2 is a side view of a roadway in a conventional roadway support structure;

fig. 3 is a top view of a roadway in a conventional roadway support structure;

fig. 4 is a top view of a roadway in the roadway support structure of the present invention;

FIG. 5 is a schematic structural view of an iron back plate according to the present invention;

In the figure: 1-forepoling bar, 2-rings, 3-iron back plate, 3-1-arc iron plate, 3-2-locking device, 3-21-forepoling bar sleeve, 3-22-handle and 4-wood back plate.

Detailed Description

the invention will be further described with reference to the accompanying drawings

The process of the front cantilever as shown in fig. 4 includes the following steps:

Step one, knocking the help and asking the top on the premise of ensuring safety after the tunneling working face tunnels forwards.

And step two, installing lifting rings 2 on the permanent support anchor rods at the tops of the two rows of the front roadway.

connecting the two nets to a top plate net in the center of the roadway by using iron wires, and supporting the connected two rectangular nets with the size of 1000 multiplied by 2000mm by using supporting rods; and the long edges of two pieces of nets laid in the center of the roadway are connected, and the connecting lines need to be superposed with the central line of the roadway.

Fourthly, sequentially penetrating the front canopy with the length of 3500mm-4200mm through a front lifting ring 2 and a rear lifting ring 3 which are connected with the rear of the paved area and parallel to the tunneling direction of the roadway, and sequentially placing the iron back plates 3 between the adjacent front canopy 3 in a staggered manner; the position of the iron back plate 3 is adjusted while the forepoling beam 1 is penetrated, and the iron back plate 3 is locked when the position of the iron back plate 3 is adjusted to be uniformly arranged on the forepoling beam 1 in front of the permanent support.

as shown in fig. 5, the iron back plate 3 is made of an arc-shaped iron plate 3-1 with a radius of not less than 3m, and the arc-shaped iron plate 3-1 has a length of not less than 1000mm, a width of not less than 100mm, and a thickness of not less than 8 mm. A front canopy sleeve 3-21 with the inner diameter slightly larger than the outer diameter of the front canopy 1 is welded on the arc-shaped inner side of the iron plate, and a locking device is formed on the side surface of the front canopy sleeve 3-21 by welding a nut, matching with a bolt and a handle 3-22 welded on the bolt. The bolt wire column is pressed against the forepoling bar 1 to achieve the purpose of fixed locking by rotating the handles 3-22.

And step five, adjusting the position of the bolt of the lifting ring to fix the front cantilever and the iron back plate.

and step six, connecting the net to a permanent support net at the front end behind the non-temporary support area by using an iron wire, and supporting the net by using a support rod for laying.

and step seven, synchronizing the step four and the step five, and performing temporary support on the rest regions which are not temporarily supported.

step eight, checking the supporting effect, and wedging the loosely and loosely supported iron back plate and the front canopy by using a wood wedge;

And step nine, protecting the exposed rocks of the head-on wall and the side walls at the two sides by using a net.

in the invention, because the roadway width in each mine is different, the relationship between the installation number of the front canopy beams and the roadway width is satisfied as follows: when the width of the roadway is 3m or below 3m, the number of used front canopy is not less than 3; when the width of the roadway is n-n +1 m, the number of the used forepoling beams is not less than the odd number of n and n + 1.

By adopting the construction and installation method, the construction efficiency of the temporary support of the roadway can be greatly improved, and the installation time of the total temporary support is controlled within 15 minutes.