Layered support method for rectangular coal roadway based on deep soft composite roof
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A composite roof and weak technology, which is applied in the direction of earthwork drilling, mining equipment, bolt installation, etc., can solve the problems of insufficient grouting volume, inability to grouting support, etc., achieve timely grouting timing, save grouting cost, The effect of improving reliability
What is AI technical title?
AI technical title is built by PatSnap AI team. It summarizes the technical point description of the patent document.
A composite roof and weak technology, which is applied in the direction of earthwork drilling, mining equipment, bolt installation, etc., can solve the problems of insufficient grouting volume, inability to grouting support, etc., achieve timely grouting timing, save grouting cost, The effect of improving reliability
CN105736022BActive 📅 Publication Date: 2018-01-12ANHUI UNIV OF SCI & TECH
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[0028] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.
[0029] A layered support method for a rectangular coal roadway based on a deep weak composite roof of the present invention is obtained according to the mine drilling columnar diagram, the geological overview of the composite roof before the working face without recovery, the positions of soft and hard rock formations; when working After face mining, the location and range of crack development on the roof of the roadway are detected with a borehole peeper; then, the composite roof is supported layer by layer by using short grouted anchors and long grouted anchors with anchor cables.
[0030] A layered support metho...
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Abstract
The invention discloses a layered supporting method based on a deep rectangular coal roadway with a tender composite roof. The layered supporting method is suitable for a coal face of a deep mine, and deformation of the rectangular mining roadway with the tender composite roof is controlled. Firstly, a borehole columnar section is used for judging the geological occurrence of the roadway roof, then a borehole observation instrument is used for detecting fracture development of the roadway roof in the coal mining process, and afterwards the effect of layered supporting is achieved through a short grouting anchor, a long grouting anchor and an anchor cable. By the adoption of the layered supporting method based on the deep rectangular coal roadway with the tender composite roof, according to the detected fracture development of the roof in the coal mining process, grouting supporting is carried out in time, grouting is carried out in time, the grout amount is more sufficient, and grouting cost is lowered.
Description
technical field [0001] The invention relates to a layered support method for a rectangular coal roadway based on a deep weak composite roof, which is suitable for deep mine coal mining face and controls the deformation of a rectangular mining roadway whose roof is weak and composite. Background technique [0002] The stability control technology of mining roadway in deep mine coal mining face has always been a key research direction in the field of mine pressure research. However, due to factors such as complex geological conditions and structural stress in coal mines, there have always been great difficulties in the research on surrounding rock control technology. Especially for the research on mining tunnels with weak composite roofs in deep wells, many scholars have carried out tireless explorations and proposed many valuable surrounding rock control schemes. The representative results are: tunnel step support method, the main principle of which is first The surrounding ...
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