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Special strip type filling mining method

A backfill mining method and strip-type technology, which is applied in special mining, backfill, surface mining, etc., can solve the problems of gas escape and insufficient underground gangue, save time, reduce engineering disturbance, and achieve excellent results.

Active Publication Date: 2021-02-26
GUIZHOU UNIV
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  • Application Information

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Problems solved by technology

[0009] The invention provides a special strip-type filling mining method to solve the problems of "insufficient underground gangue" and "gas escape to the working face" in the traditional filling mining technology, so that the process of roadside support becomes It is more convenient, reduces the engineering disturbance to the upper and lower sections by mining in this section, and at the same time has a good control effect on large-area surface settlement

Method used

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Embodiment 1

[0029] refer to Figure 1 to Figure 6 , this embodiment provides a special strip filling mining method, as follows:

[0030] Taking the first section 1, the second section 10, the third section 12 to the fourth section 13 as examples, firstly, each section is divided into a plurality of partial filling areas 8 and collapsed areas 7 in a strip shape, and the local filling Zones 8 are distributed at equal intervals along the mining direction. Between two adjacent partial filling zones 8 is a caving zone 7. Starting from section 1, along the mining direction, two partial filling zones 8 and two caving zones Zone 7 is taken as a group, i.e. a mining cycle, to be mined zone by zone, and partial backfill support is carried out at the same time as partial filling zone 8 is exploited, so that the partial filling zone 8 after mining has local support 81, and the adjacent partial filling zone The local supports 81 in 8 are arranged in a staggered manner. While mining, the construction ...

Embodiment 2

[0035] refer to Figure 1 to Figure 6 , taking the mining of section 1 as an example, the specific steps are as follows:

[0036] 1) A section 1 is divided into a plurality of partial filling areas 8 and collapsed areas 7 in a strip shape. Assuming that the first mining area is the caving area 7, during mining, the coal cutter pushes and moves the frame every time a knife is cut, and after the filling hydraulic support 5 moves a step, it supports the side of the roadway in the moving step. The upper and lower parts of the filling area are equipped with baffles, and the filling area is filled with coal gangue transported by the filling hydraulic support 5. After the front side is filled with one knife, the next coal cutting and filling process can be carried out until the strip mining is completed and the roadside support 9 The filling area is filled;

[0037] 2) The second mining area is the partial filling area 8. When mining the local filling area 8, the local support 81 in...

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Abstract

The invention provides a special strip type filling mining method. A filling area and a caving area in a strip are reasonably planned, coal gangue produced in the mining and tunneling process is reasonably distributed, and the problems that in a traditional filling mining technology, the amount of underground gangue is insufficient, and gas in a goaf escapes to a working face are solved by combining the gas extraction design of the goaf and the roadside support design of gob-side entry retaining, so that the working procedure of roadside support becomes simpler and more convenient, the engineering disturbance of mining of the section to the upper section and the lower section is reduced, and meanwhile, a good control effect is achieved on large-area settlement of the earth surface. The invention belongs to the field of coal mining.

Description

technical field [0001] The invention relates to a special strip filling mining method, which belongs to the technical field of coal mining. Background technique [0002] China's primary energy reserve characteristics of rich coal, poor oil and little gas and the stage of economic development determine that coal will still dominate China's primary energy consumption structure for a relatively long period of time. Most of my country's coal resources rely on underground mining, and the total caving roof management not only promotes economic development, but also causes environmental problems such as groundwater loss and surface subsidence. Aiming at a series of problems caused by the caving method, our country has proposed the filling mining technology, which has achieved good results through practice. As the coal industry continues to approach a safe, green, and economical energy industry system, coal mine filling and mining has become a trend, and coal gangue filling is a lo...

Claims

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Application Information

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IPC IPC(8): E21C41/18E21F15/00E21F7/00
CPCE21C41/18E21F15/00E21F7/00
Inventor 刘萍贾毅超敖以章韩绅陈镇罗畅
Owner GUIZHOU UNIV
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