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A method for precise prevention and control of rock burst in remote areas of underground coal mines

A technology of rock burst and area, applied in drilling equipment and methods, directional drilling, earth-moving drilling, etc., can solve problems such as long-distance prevention and control of rock burst in regional areas, reduce operating costs, and achieve good construction lead. Avoid the effect of ineffectiveness

Active Publication Date: 2020-12-25
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0007] In order to solve the problem of rock burst in remote prevention and control areas, the present invention provides a method for precise prevention and control of rock burst in remote areas of coal mines

Method used

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  • A method for precise prevention and control of rock burst in remote areas of underground coal mines
  • A method for precise prevention and control of rock burst in remote areas of underground coal mines
  • A method for precise prevention and control of rock burst in remote areas of underground coal mines

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Embodiment Construction

[0035] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0036] The invention discloses a method for precise prevention and control of rockburst in a remote area of ​​an underground coal mine, which includes a coal seam 2 inside a production stop line 12, a hard roof 5 above the coal seam 2; inside the hard roof 5 and / or above the hard roof 5 The shock vibration source 3 generated by the broken plate 14 due to the fault plane 15 is generally provided with an upper trough 10 and a lower trough 11 on both sides of the stop line 12; the following steps are also included:

[0037] a. According to geological and mining conditions, analyze and evaluate the impact risk of mining engineering and adjacent areas, determine the main controlling factors of rock burst, judge the location and intensity of shock vibration source, and determine the rock burst risk area4.

[0038] b. If it is determined in ...

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Abstract

The invention discloses a method for precise prevention and control of rock burst in a remote area under a coal mine. The method comprises the following steps: analyzing and evaluating impact risks ofmining engineering and each adjacent area according to geological and mining conditions; determining impact vibration sources, stress wave spreading paths and rock burst risky areas; formulating keytechnological parameters of directional drilling and segmented controllable fracturing; conducting directional long drilling and branch drilling at the impact vibration sources or in areas of the impact stress wave spreading paths with a directional drilling machine; adopting retreating-type, step-by-step and segmented controllable fracturing; and conducting quantitative evaluation of accurate prevention and control effects in the remote area through monitoring and inverse analysis of effective influential areas of directional drilling and segmented fracturing. The method has the beneficial effects that bending energy, fracture energy, impact energy and structural activation energy of a high-altitude roof can be effectively reduced, or the impact stress wave spreading paths can be cut off,or stress wave spreading strength can be reduced; finally, accurate and efficient prevention and control of rock burst in a remote area can be realized; and the method is especially applicable to prevention and control of large rock burst of a roof-fracture type and a structural-activation type.

Description

technical field [0001] The invention relates to a method for preventing and controlling rock burst, in particular to a method for accurately preventing and controlling rock burst in a remote area under a coal mine. Background technique [0002] Statistics show that more than 80% of my country's rock burst mines have thick and hard roofs. In the process of deep coal and resource mining, the impact of thick and hard roof on rock burst is firstly that the large-area suspended roof makes the vertical stress concentration of local coal body higher and the energy density is higher, and the other is that the large area of ​​the roof suddenly The strong dynamic load formed by the fault instantly leads to the dynamic instability of the coal-rock mass. It has the characteristics of wide impact range, high release energy, sudden and violent occurrence, and is easy to cause huge damage. Roof fracture type and fault activation type rock burst are the main reasons for frequent occurrenc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B7/02E21B7/04E21B43/26E21B47/00E21B47/06
CPCE21B7/02E21B7/04E21B43/26E21B47/00E21B47/06
Inventor 王恩元张超林刘晓斐沈荣喜冯小军
Owner CHINA UNIV OF MINING & TECH
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