Method for judging separation roof stope impact risk through window intervention method
A dangerous and interventional technology, applied in mining installations, mining equipment, earth-moving drilling, etc., can solve the problem that it is difficult to quantitatively warn the risk of abscission stope impact, and it is difficult to monitor the roof stress distribution of the abscission stope. Issues such as energy release range
Pending Publication Date: 2021-03-12
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology
Conventional methods and conventional monitoring techniques are difficult to quantitatively warn the impact risk of the stope in the separation layer, and it is difficult to monitor the stress distribution and energy release range caused by the roof of the roadway in the separation layer stope
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Embodiment Construction
[0017] The embodiment of the present invention provides a method for judging the impact risk of a separation roof stope by a window intervention method, including the following steps:
[0018] 1. According to the geological mining conditions of the abscission roof stope, the rockburst risk assessment report and other data, combined with the specific rock pressure observation data, determine the impact risk area, see figure 1 ;
[0019] 2. Expand the roadway in the impact danger area, construct the chamber, and arrange the pillars in the chamber. It is required that the pillars are not drilled to the bottom, and the pressure and displacement sensors are installed. 1 is the roadway, 2 is the chamber, 3 is the pillar, and 4 is the dynamic instrument. See figure 2 ;
[0020] 3. Continuously observe the pressure and displacement changes of the support body under static and dynamic loads, and determine the impact risk degree according to the sudden change of pressure and displace...
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The invention discloses a method for judging the separation roof stope impact risk through a window intervention method. The method comprises the following steps: 1, determining a dangerous area, namely determining the dangerous area by combining specific mine pressure monitoring data according to specific conditions of a coal seam roof, a support form, impact ground pressure influence factors andan impact ground pressure risk evaluation result; 2, adopting a man-made window intervention technology, specifically, for a stope of a separation roof, chamber construction of a roadway side is conducted in a dangerous area, then a supporting body is preset in a chamber, a pressure sensor and a displacement sensor are installed on the supporting body in a protection mode, and a sensor observation window is arranged on one side of a roadway; and 3, judging the impact risk by sudden change of the resistance and displacement of the support body in the window: continuously observing the pressureand displacement conditions of the support body, and taking the sudden change as the early warning of the impact risk when the pressure and displacement of multiple chamber support bodies suddenly change.
Description
technical field [0001] The invention belongs to the technical field of coal mining, in particular to a method for judging the impact risk of a separation roof stope by a window intervention method. Background technique [0002] The roof (rock burst) accident caused by mining is one of the major disaster accidents in mines. With the increase of mining depth and the complexity of geological conditions, the support resistance is often insufficient, and the phenomenon of roadway roof separation often occurs during the mining process, resulting in If the support fails, a local or large-scale roof collapse accident occurs, which not only affects the production, but also causes serious safety hazards. As the mining depth increases, the deep geological concealment is enhanced, and the support is not in place. If the coal seam still has the risk of impact, it will lead to the impact dynamic pressure disaster of roof separation and fracture. Rapid fall in a large area is a composite ...
Claims
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IPC IPC(8): E21F17/18
CPCE21F17/185
Inventor潘立友孙久政陈理强欧阳振华
OwnerSHANDONG UNIV OF SCI & TECH