Drilling pressure relief control method of longwall-face mining roadway with deformed forepole support sections

A technology of mining roadway and advanced support, which is applied in drilling equipment and methods, ground mining, earth-moving drilling, etc., can solve the problems of high labor intensity, low efficiency, frequent movement of drilling rigs, etc., and achieve the effect of improving fracturing effect.

Inactive Publication Date: 2016-12-07
CHINA UNIV OF MINING & TECH
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Problems solved by technology

An important problem for pressure relief in rows of drilling holes is that in the construction of hig

Method used

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  • Drilling pressure relief control method of longwall-face mining roadway with deformed forepole support sections
  • Drilling pressure relief control method of longwall-face mining roadway with deformed forepole support sections

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Embodiment 1

[0029] Embodiment 1: The drilling-production pressure relief control method of the deformation of the advanced support section of the longwall working face mining roadway of the present invention, the implementation process mainly includes three aspects: the design of drilling parameters, the design of the drilling-production system and the selection of equipment, and Drilling technology design and construction.

[0030] Design of drilling parameters: According to the conditions of the coal seam 10 and the design parameters of the roadway 2, the depth d 5 of the drilling 4, the horizontal distance w 14 of the drilling and the vertical distance h 15 between the drillings are determined.

[0031] Drilling and mining system design and equipment selection: According to the section size of the roadway 2 and the conditions of the bottom plate 12, determine the composition of the drilling and mining coal transportation system and the parameters and parameters of the auger shearer 6, s...

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Abstract

The invention discloses a drilling pressure relief control method of a longwall-face mining roadway with deformed forepole support sections and belongs to drilling pressure relief control method for roadway deformation. Softening of surrounding rocks of the mining roadway due to forepole support pressure of a longwall face lowers the control effect of forepole support. According to features of dynamic traction of the mining face, pressure-relief boreholes are constructed by adopting an auger drill miner, stress of shallow surrounding rocks is lowered, and control difficulty brought by stress softening of high surrounding rocks of the roadway is alleviated. The technical scheme includes that three-hole drill holes are designed in the roadway, horizontal and vertical distance between the depth of the drill holes and the neighboring drill holes is determined according to section size of the roadway and physical and mechanical parameters of a coal body, an auger mining production system is arranged in the roadway, pressure-relief boreholes are constructed in areas close to forepole support pressure affection area, and drilling equipment is moved forward continuously with advancing of the working face. By the arrangement, the control effect of the forepole support of the working face is favorably improved, labor intensity is lowered, and production efficiency of the working face is improved.

Description

technical field [0001] The invention relates to a drilling-production pressure relief control method for roadway deformation, in particular to a drilling-production pressure relief control method for the deformation of the advanced support section of the mining roadway in a longwall working face. Background technique [0002] After the recovery roadway of the longwall working face is affected by the advanced support pressure, the surrounding rock often produces large convergence deformation, which affects its normal use, and the roadway in this section is the overlapping point of the production systems of the working face, with many production processes and equipment , there are many operators, and the process is complicated. Ensuring the stability of the surrounding rock of the roadway in this area and ensuring sufficient working space have become the focus and difficulty of mine pressure control on the working face. [0003] At present, mining roadways mainly use dense pil...

Claims

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Application Information

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IPC IPC(8): E21C41/18E21B7/00
CPCE21C41/18E21B7/00
Inventor 杨培举刘长友吴锋锋鲁岩杨敬轩张宁波
Owner CHINA UNIV OF MINING & TECH
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