Mining method for one-time false bottom cemented filling after open-stope method
A mining method and cemented filling technology, which is applied to filling materials, ground mining, mining equipment, etc., can solve the problems of false bottom construction period, long maintenance time, and low mining efficiency, so as to improve recovery rate, ensure strength, and increase resources The effect of utilization
Inactive Publication Date: 2018-11-16
GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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[0003] The purpose of the present invention is to provide a mining method of one-time false bottom cementation and filling after the open field method to solve the problems of long construction period and maintenance time and low mining efficiency of the false bottom in the traditional open field method stope subsequent one-time cemented mining process
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Embodiment 1
[0020] Gansu Jingtieshan Mining Co., Ltd. Huashugou Copper Mine 2760-2820 middle section has adopted the technical scheme of the present invention. The middle section of Huashugou Copper Mine has a thick ore body, and the thickness of the middle part of the ore body is greater than 30m. According to the actual production conditions, the Huashugou Copper Mine is divided into a middle section every 60m, a layer every 10m, and an ore outlet river is arranged every 10m at the bottom of the middle section to form an ore outlet structure. Construction process such as figure 1 As shown, the steps are as follows:
[0021] A. Layout of rock-drilling roadway in mine house: the ore blocks are divided according to the way that mine house and ore pillar are alternately arranged, and the middle section adopts vertical ore body to arrange mine house, and the width and height of rock-drilling roadway are both 3m;
[0022] B. False bottom laying of rock drilling roadway: Lay a 0.5m thick rei...
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The invention discloses a mining method for one-time false bottom cemented filling after an open-stope method, and belongs to the field of underground mining methods. The problems of long constructionperiod and maintenance time of a false bottom and low mining efficiency of a traditional one-time cemented mining process after an open stope are solved. According to the technical scheme, the miningmethod comprises the steps that chamber stoping is carried out, and then a chamber is filled after stoping; stoping of a pillar is carried out, and then the pillar is filled after stoping; and sill pillars reserved in the stoping process of the chamber and the pillar are extracted, the bottoms of the excavated sill pillars are paved with false bottoms, and then sill pillar filling is carried out.The mining method has the beneficial effects that the damage to false bottoms in the traditional process due to chamber stoping and ore falling can be avoided, the strength of the filling false bottoms is well guaranteed, and a necessary condition is provided for the recovery of a roof pillar of next procedures; the recovery rate of the roof pillar can be increased; and the problems that the construction period is long and the recovery efficiency is low due to the fact that the first step of sill pillar excavation is carried out and then the false bottoms are laid can be avoided.
Description
technical field [0001] The invention belongs to the field of underground mining methods, and in particular relates to a mining method of one-time false bottom cementing filling after the open field method. Background technique [0002] The one-time cemented mining process of the traditional open stope stope first carries out excavation of the bottom pillar, laying of the false bottom, and then mining and filling of the mine room and pillar. This requires the false bottom to withstand the impact of ore falling and mining blasting later. The process has high requirements on the strength of filling the false bottom, and the construction period and maintenance time of the false bottom are long. Due to the difficulty in digging the bottom pillar and laying the false bottom, the amount of ore mined in the early stage is small, and the mining efficiency is low. Contents of the invention [0003] The purpose of the present invention is to provide a mining method of one-time false ...
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IPC IPC(8): E21C41/22E21F15/00
CPCE21C41/22E21F15/00
Inventor 陈大佼田宏海王东华
Owner GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD