阅读说明：本技术 一种处理溜槽积矿的***方法 (Blasting method for treating chute accumulated ore ) 是由 白万明 王军宏 张万生 齐泽文 许守信 于 2019-10-18 设计创作，主要内容包括：本发明公开了一种处理溜槽积矿的爆破方法,属于爆破技术领域,针对溜井底部积矿厚度过大导致放矿不畅的问题,采用直径50mm的钢管,将其一端底部加工成楔角,另一端焊接一螺母,并在其螺母上系上钢丝绳,用于将钢管固定在设计爆破的位置,然后将钢管在外力作用下插入溜井底部积矿,根据钢管打入深度计算装药量和堵塞高度,选择导爆管韧性较高的高精度导爆管雷管与直径40mm的棒状乳化炸药,将其加工成爆破装置装入钢管内,装入深度低于积矿矿石面20cm,上部用细沙填堵,填塞高度不少于50cm,最后进行爆破。本发明可以有效解决溜井底部积矿过多导致的放矿不畅问题,减少堵矿后人员处理频次,降低溜井捅矿、爆破安全风险,提高溜井放矿效率。(The invention discloses a blasting method for treating chute accumulated ore, which belongs to the technical field of blasting, and aims at solving the problem of unsmooth ore drawing caused by overlarge thickness of the accumulated ore at the bottom of a draw shaft, a steel pipe with the diameter of 50mm is adopted, the bottom of one end of the steel pipe is processed into a wedge angle, a nut is welded at the other end of the steel pipe, a steel wire rope is tied on the nut and used for fixing the steel pipe at a designed blasting position, then the steel pipe is inserted into the accumulated ore at the bottom of the draw shaft under the action of external force, the loading amount and the blocking height are calculated according to the driving depth of the steel pipe, a high-precision detonating tube detonator with higher detonating tube toughness and a rod-shaped emulsion explosive with the diameter of 40mm are selected and processed into a blasting device which is loaded into the steel pipe, the loading depth is 20cm lower than the surface of the. The ore drawing device can effectively solve the problem of unsmooth ore drawing caused by excessive ore accumulation at the bottom of the ore pass, reduce the frequency of personnel handling after ore blockage, reduce the safety risks of ore poking and blasting of the ore pass, and improve the ore drawing efficiency of the ore pass.)

1. A blasting method for treating chute deposits is characterized by comprising the following steps:

step 1: firstly, sequentially arranging a buffer hole (3), a peripheral hole (2) and a main blasting hole (1) in the direction from an ore drawing boundary (4) at the bottom of the ore pass to a free surface (5), wherein the depths of the main blasting hole (1), the peripheral hole (2) and the buffer hole (3) are designed by taking an ore accumulation inclined plane (6) at the bottom of the ore pass as a reference plane;

step 2: arranging a main blasting hole (1) on the central line of an ore accumulation inclined plane (6) at the bottom of the ore pass, arranging peripheral holes (2) on two sides of the main blasting hole (1), and arranging a buffer hole (3) at 1m of an ore drawing boundary (4) at the bottom of the ore pass;

and step 3: the main explosion hole (1), the peripheral hole (2) and the buffer hole (3) adopt radial non-coupling explosive charging, the non-coupling coefficient is determined by the diameter of an explosive cartridge and the diameter of an adopted steel pipe, and the explosive charging height is determined according to the ore deposit thickness and the depth of the steel pipe driven into the ore deposit;

and 4, step 4: the main explosion hole (1) is provided with 1 row, and the charging height of the main explosion hole (1) is kept at 70% of the depth of the steel pipe to be driven into the main explosion hole; the peripheral holes (2) are arranged around two sides of the main blasting hole (1), 2-4 rows are arranged according to the width of an ore accumulation inclined plane (6) at the bottom of the orepass, and the charging height of the peripheral holes (2) is kept at 60% of the depth of the steel pipe to be driven; the buffer holes (3) are arranged at 1m of the ore drawing boundary (4) at the bottom of the ore pass and are arranged in 2 rows, and the charging height of the buffer holes (3) is kept at 40-50% of the depth of the steel pipe to be driven.

2. The blasting method for treating the accumulated ores in the chute according to claim 1, wherein the diameter of the steel pipe in the steps 3 and 4 is 50mm, the bottom of the steel pipe is processed into a wedge angle, the steel pipe is inserted into the accumulated ores at the bottom of the chute, a nut is welded to the other end of the steel pipe, the steel pipe is fixed at a desired position by a steel wire rope before the ores are driven, and the steel pipe is driven into the accumulated ores by external force.

3. The blasting method for treating the chute accumulated ore according to claim 1, wherein the loading amount and the blocking height are calculated according to the driving depth of the steel pipe during the loading in the step 4, a high-precision detonator with a detonator with higher toughness is selected to be firmly fixed with a columnar emulsion explosive with the diameter of 40mm and then is loaded into the steel pipe, the driving depth is 20cm lower than the ore surface, the upper part is filled with fine sand, the filling height is not less than 50cm, the steel pipe is completely driven into the steel pipe and then is loaded once, and simultaneously, the blasted ore is discharged after passing through an ore discharge gate (7).

Technical Field

The invention belongs to the technical field of mining, and particularly relates to a blasting method for treating chute accumulated ore.

Background

The ore pass transportation is used as a main mining transportation mode and is widely applied at present, but the hidden troubles of ore blockage and ore accumulation exist in the actual use process. The common methods for treating the problems of ore blockage and ore accumulation at the bottom of a chute of a high-depth draw shaft include high-pressure air blowing, ore poking with a bamboo rod, bamboo rod explosive blasting and the like, but the practical effects cannot completely solve the problems.

Disclosure of Invention

Aiming at the problems and the defects in the prior art, the invention provides a blasting method for treating the chute accumulated ore.

In order to achieve the purpose, the invention provides the following technical scheme:

a blasting method for treating chute deposits is carried out according to the following steps:

step 1: firstly, sequentially arranging a buffer hole, a peripheral hole and a main blasting hole in the direction from the ore drawing boundary at the bottom of the ore pass to a free surface, wherein the depths of the main blasting hole, the peripheral hole and the buffer hole are designed by taking an ore accumulation inclined plane at the bottom of the ore pass as a reference plane;

step 2: arranging a main blasting hole on a central line of an ore accumulation inclined plane at the bottom of the orepass, arranging peripheral holes on two sides of the main blasting hole, and arranging a buffer hole at 1m of an ore drawing boundary at the bottom of the orepass;

and step 3: the main blasting holes, the peripheral holes and the buffer holes are charged in a radially uncoupled mode, the uncoupled coefficient is determined by the diameter of an explosive cartridge and the diameter of the adopted steel pipe, and the charging height is determined according to the ore accumulation thickness and the depth of the steel pipe driven into the ore accumulation;

and 4, step 4: the main blasting holes are arranged in 1 row, and the charging height of the main blasting holes is kept at 70% of the depth of the steel pipe; the peripheral holes are arranged around two sides of the main blasting hole, 2-4 rows are arranged according to the width of the ore accumulation inclined plane at the bottom of the orepass, and the charging height of the peripheral holes is kept at 60% of the depth of the steel pipe to be driven; the buffer holes are arranged at 1m of the ore drawing boundary at the bottom of the orepass and are arranged in 2 rows, and the filling height of the buffer holes is kept at 40-50% of the depth of the steel pipe to be driven.

Further, the diameter of the steel pipe in the step 3 and the step 4 is 50mm, the bottom of the steel pipe is processed into a wedge angle, then the steel pipe is inserted into ore deposit at the bottom of the orepass, a nut is welded at the other end of the steel pipe, the steel pipe is fixed at a required position by a steel wire rope before the ore is thrown in, and meanwhile, the steel pipe is thrown into the ore deposit by external force.

Further, in the step 4, the charging amount and the blocking height are calculated according to the driving depth of the steel pipe during charging, a high-precision detonator with a detonator with higher toughness is selected to be fixedly and firmly fixed with the columnar emulsion explosive with the diameter of 40mm and then is loaded into the steel pipe, the driving depth is 20cm lower than the surface of the ore, the upper part of the detonator is filled with fine sand, the filling height is not less than 50cm, the steel pipe is completely driven into the steel pipe and then charged once, and simultaneously, the steel pipe is detonated, and the detonated ore is discharged after passing through an ore discharge gate.

Compared with the prior art, the invention has the beneficial effects that:

the peripheral holes are arranged on the two sides of the main blasting hole, the buffer holes are arranged at the 1m position of the ore drawing boundary at the bottom of the draw shaft, and the main blasting hole, the peripheral holes and the buffer holes are charged in a radial non-coupling mode, so that the charging heights in the steel pipes are within the range of the depth of the steel pipes driven into the ore deposit, the efficiency of explosive explosion energy on the ore deposit is improved, the damage of explosive flying stones and shock waves is reduced, and the problem of ore deposit at the bottom of the draw shaft is thoroughly solved.

Drawings

FIG. 1 is a schematic view of a blast hole arrangement of the present invention;

FIG. 2 is a schematic diagram of the depth of blast hole and the charging structure of the present invention.

In the figure: 1. the main blasting hole, the peripheral hole, the buffer hole, the ore drawing boundary, the free surface, the ore accumulating inclined surface and the ore drawing gate are sequentially arranged in the main blasting hole, the peripheral hole, the buffer hole, the ore drawing boundary, the free surface and the ore accumulating inclined surface.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-2, a blasting method for treating a stockpiled ore comprises the following steps:

step 1: firstly, sequentially arranging a buffer hole 3, a peripheral hole 2 and a main blasting hole 1 in the direction from an ore drawing boundary 4 at the bottom of the ore pass to a free surface 5, wherein the hole depths of the main blasting hole 1, the peripheral hole 2 and the main blasting hole 3 are designed by taking an ore accumulation inclined plane 6 at the bottom of the ore pass as a reference plane;

step 2: arranging a main blasting hole 1 on a central line of an ore accumulation inclined plane 6 at the bottom of the orepass, arranging peripheral holes 2 on two sides of the main blasting hole 1, and arranging a buffer hole 3 at 1m of an ore drawing boundary 4 at the bottom of the orepass;

and step 3: the main explosion hole 1, the peripheral hole 2 and the buffer hole 3 adopt radial non-coupling explosive charging, the non-coupling coefficient is determined by the diameter of an explosive cartridge and the diameter of an adopted steel pipe, and the explosive charging height is determined according to the ore deposit thickness and the depth of the steel pipe driven into the ore deposit;

and 4, step 4: the main blast hole 1 is provided with 1 row, and the charging height of the main blast hole 1 is kept at 70% of the depth of the steel pipe; the peripheral holes 2 are arranged around the two sides of the main blast hole 1, 2-4 rows are arranged according to the width of an ore accumulation inclined plane 6 at the bottom of the orepass, and the charging height of the peripheral holes 2 is kept at 60% of the depth of the steel pipe to be driven; the buffer holes 3 are arranged at 1m of the ore drawing boundary 4 at the bottom of the orepass, 2 rows are arranged, and the charging height of the buffer holes 3 is kept at 40-50% of the depth of the steel pipe to be driven.

When the device is used specifically, a steel pipe collision wedge type blasting method is adopted to treat chute accumulated ore, a steel pipe with the diameter of 50mm is adopted, the bottom of the steel pipe is processed into a wedge angle, then the steel pipe is inserted into the ore accumulated ore at the bottom of a chute, a nut is welded at the other end of the steel pipe, the steel pipe is fixed at a required position by a steel wire rope before the ore is thrown in, meanwhile, the steel pipe is thrown into the ore accumulated ore by external force, the loading amount and the blocking height are calculated according to the throwing depth of the steel pipe, a high-precision detonating tube detonator with higher detonating tube toughness is selected to be firmly fixed with columnar emulsion explosive with the diameter of 40mm and then is arranged in the steel pipe, the throwing depth is 20cm lower than the ore surface, the upper part of the detonating tube is filled.