A kind of underground stope artificial point column expansion roofing device and construction method
A manual, point-to-column technology, used in mining equipment, earth-moving drilling, pillars/supports, etc., to achieve the effect of speeding up the top connection speed, long the top connection stroke, and preventing further deformation
Active Publication Date: 2017-06-09
NORTHEASTERN UNIV LIAONING
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Problems solved by technology
[0006] The present invention aims at the problems existing in the existing artificial point column roofing technology, and provides an artificial point column expansion roofing device with simple structure, low cost, convenient use, quick and active roofing, good roofing effect, and large supporting force. construction method
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[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0036] Such as figure 1 As shown, a kind of underground stope artificial point column expansion roofing device is used in the underground stope. The underground stope has a stope floor 11 and a stope roof 1. The artificial point column foundation 10 is set on the stope floor. An expansion roofing device is installed on the column foundation 10. The artificial point column foundation 10 is a waste rock with a large size (300mm-500mm) produced in the underground excavation operation. The artificial masonry is built from the bottom of the stope to the roof, or the formwork is built in the stope and the artificial masonry is poured with concrete. The top of the artificial point column foundation 10 is relatively flat, parallel to the stope roof 1, and a certain space 2 for connecting the roof is reserved for placing the expansion connect...
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The invention discloses an artificial point column expansion roofing device in an underground stope, which is installed between the artificial point column foundation and the stope roof, and includes an upper outer sleeve, an inner sleeve and a lower outer sleeve, the inner sleeve is placed on the upper In the outer outer barrel and the lower outer barrel, the upper outer barrel has a barrel bottom I and a barrel wall I, the lower outer barrel has a barrel bottom II and a barrel wall II, and the upper outer barrel is set above the inner sleeve, The outer wall of the inner sleeve fits with the inner wall of barrel wall Ⅰ, the lower outer outer barrel is sleeved under the inner sleeve, the outer wall of the inner sleeve fits with the inner wall of barrel wall Ⅱ, and the inner sleeve is formed by the lower A crushed stone cushion and an expansion agent roll are arranged in sequence at the top, and sand and gravel are filled on the expansion agent roll. Both the bottom I and the bottom II of the barrel are provided with drainage and vent holes. It has the advantages of simple structure, low cost, convenient use, quick and active connection to the roof, good effect of connection to the roof, and large supporting force.
Description
technical field [0001] The invention belongs to the technical field of mining engineering, and in particular relates to an artificial point column expansion roofing device and a construction method for an underground stope. Background technique [0002] In the field of non-coal mine mining engineering, the open-stop mining method, as one of the three major mining methods, has always occupied an important position. The main feature of the open-field method is to divide the ore block into mine rooms and ore pillars, and the goaf formed when returning to the mine room uses the top pillars, bottom pillars, and inter-pillars set around the mine house and the left pillars in the mine house. Set up regular or irregular point columns to support the empty field formed after the mining of the mining house and maintain its stability. [0003] The ore pillars left by the open-field method are usually recovered uniformly at the end of mine production, but the recovery rate is low and th...
Claims
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IPC IPC(8): E21D15/48
CPCE21D15/483
Inventor 李元辉冯夏庭李坤蒙张凤鹏安龙戴星航
Owner NORTHEASTERN UNIV LIAONING