Filling roof-contacted method

Abstract

The invention discloses a filling roof-contacted method, which comprises the following steps of: after stoping of a stope is finished, performing filling operation, and reserving an empty roof height relative to a top plate of the stope; when filling reaches the reserved empty roof height position, filling is stopped; after the filling body is solidified, upward blast holes are drilled in the top plate of the stope; charging explosives into the blast holes and connecting lines; the space with the reserved empty roof height is filled; and after the filling slurry is initially set, the blast holes are blasted, and roof contact is conducted through the broken expansion property of the blasted ore rock. According to the method, the hole arrangement range can be determined, the drilling depth of the top plate can be controlled and the top breaking range and the top breaking height can be adjusted according to the requirements of filling and roof-contacting, the adaptability is high, the roof-contacting rate is high, and the roof-contacting effect is good.

Description

technical field [0001] The invention relates to the field of mining, and more specifically, relates to a stope filling and roofing method. Background technique [0002] In the field of mining, in order to recover ore safely and efficiently, many mines are mined by filling and mining. The filling mining method is to gradually fill the goaf with filling material in the mine room or ore block as the mining face advances, so as to manage the ground pressure, control the collapse of the surrounding rock and the movement of the ground surface, and fill the formed filling body. Or the method of back mining under its protection. In particular, the approach-filling mining method and the stage emptying and subsequent filling mining method need to recover the stope ore in the second step under the support of the artificial false column formed by the filling in the first step. The quality of the filling in the first step directly affects the quality of the second step. Mining Safety a...

AI Technical Summary

Problems solved by technology

Because the filling slurry will shrink during the solidification process after entering the stope, even if the filling slurry fills the goaf, it still cannot be connected to the top as the slurry solidifies and shrinks, and the top connection rate is generally low

The filling roof connection rate is low, the stope roof is not in effective contact with the artificial false column formed by the filling body, and the filling body cannot play a supporting role. The top span will cause sinking and tensile damage to the roof of the stope. In the lightest case, the roof will fall and the stope will collapse, causing ore loss, and in severe cases, it will injure personnel and cause major safety accidents.

[0004] At present, in order to improve the roofing rate, mining technology researchers and mining enterprises have carried out a lot of research and practical work, and have made great progress in improving the filling rate. Point blanking and roofing filling, step-by-step roofing filling, grouting roofing filling, etc., but none of them really solve the problem of filling and roofing

Multi-point cutting only improves the leveling of the filling slurry, and the secondary void caused by the shrinkage of the slurry has not been solved; the filling of the leading water and pipe cleaning water in stages is not only complicated, but also cannot be solved. The problem of roof connection may also reduce the filling concentration, resulting in the stratification and segregation of the filling slurry in the stope, which affects the quality of the filling body; the filling effect of grouting roof connection is better, but its operation is difficult, especially in the underground. In the case of many mines, the roots cannot be realized

The low filling rate is still an important problem that plagues the quality of mine filling

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