Rapid and safe arch supporting method in process of passing through top-coal caving region
A high-risk area and brick-laying technology, which is applied in shaft lining, tunnel lining, temporary shielding, etc.
Active Publication Date: 2012-06-27
山西中矿威特矿山技术开发有限公司
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is how to pass through the high risk area quickly and safely
Method used
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Embodiment Construction
[0016] Such as figure 1 with figure 2 As shown, the present invention provides a fast and safe masonry support method in an over-elevation area, and the support method includes the following steps:
[0017] Step 1. In the roadway 9 that has been supported, fix five waste and old channel steels or I-beams 1 on the roadway wall, and the five channel steels or I-beams 1 protrude out of the supported roadway 600mm~1000mm (the distance can be determined according to the step distance of the masonry);
[0018] Step 2: Construction personnel stand under the supported roadway 9, place the reinforcement mesh or lead wire mesh 2 on the outside of the five channel steels or I-beams, and overlap the outer mesh of the roadway with the built-in wall by 100mm ( 100mm is reserved for overlapping with the next cycle when the last cycle is laid, and the lap section 7 is fastened with No. 8 lead wire every 100-200mm;
[0019] Step 3. Under the protection of the five channel steels or I-beams...
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The invention discloses a rapid and safe arch supporting method for a top-coal caving region of a coal mine roadway. The rapid and safe arch supporting method comprises the following steps of: taking waste I-shaped steel or grooved steel as an ahead temporary support for roadway tunneling; fixing the waste I-shaped steel or grooved steel on the surface of a supported roadway, and sequentially fixing woven cloth and reinforcing meshes or square hole wire meshes outside the waste I-shaped steel or grooved steel so as to form a temporary support shed roof; under the temporary support of the shed roof, constructing formworks, and pouring cement concrete between the formworks and the reinforcing meshes or square hole wire meshes till the top part of the roadway; forming an arched concrete arch masonry bearing structure at the lower part of the top-coal caving region after the cement concrete is cured; and adopting a minor-cycle operation of about 1m, performing in cycle according to the steps, thereby passing through the top-coal caving region safely and rapidly. For the top-coal caving region of the roadway, rapid and safe construction is hard to ensure by the adoption of other methods, but the top-coal caving region can be safely and rapidly passed through by the adoption of the rapid and safe arch supporting method disclosed by the invention.
Description
technical field [0001] The invention relates to a fast and safe masonry support method for a high-rise area, in particular to a fast and safe masonry support method for a high-rise area of a coal mine roadway. Background technique [0002] The high-risk area refers to the space at the top of the roadway with a volume greater than 0.5m3 due to the collapse of the roof exceeding the design height of the normal roadway by 500mm or more during the process of tunneling and tunneling; the coal mine roadway is affected by geological conditions and mining during the tunneling support process , often encounter such high risk areas, the width, length and height of the high risk areas are often different, and the roof in these areas is not completely compacted, but forms a nest-shaped area of collapse, and the height of the roof collapse It is 5-6m or even higher, and the falling roof can be seen directly. The roadway cannot pass directly under the falling gangue. Only special sup...
Claims
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IPC IPC(8): E21D11/10E21D20/00E21D19/00
Inventor 陈晓祥郑钧矛杨凯凯徐仪昌齐晓菲范增哲刘军
Owner 山西中矿威特矿山技术开发有限公司