House pillar changeable panel upward demix filling mining method

Abstract

The invention discloses a house pillar changeable panel upward demix filling mining method. An ore body is divided into an ore house and an ore pillar arranged at intervals along the strike direction; a plurality of house pillars form a panel; a rock trackless preparation system is adopted and comprises a ramp, a rock slice drift, a demix ventilation connection and a rock concentrated ore removalwinze; the mechanical upward demix filling mining method is adopted for mining, which mines a slice and fills the slice until the position required by the lower slice blasting compensation is reached. The backstopping order of the house pillars in the panel is the ore house first and then the ore pillar; all ore houses are subjected to upward backstopping at the same time; after a backstopping unit of the ore house is finished, the roof-contacted filling is carried out, and the mining of the ore house is temporarily stopped and the mining of the ore pillar is started; after two backstopping units of the ore pillar are finished, the roof-contacted filling is carried out, and the mining of the ore house is resumed; the abovementioned steps are repeated until the backstopping of the ore block is completed. The invention has the remarkable characteristics of improving the backstopping safety, reducing the resource dilution rate, lowering the support cost, increasing the enterprise profit,and the like.

Description

technical field [0001] The invention relates to a filling mining method, in particular to an upward layered filling mining method of alternating room and pillar panels. This method is mainly suitable for the mining of metal deposits with extremely thick ore bodies, relatively stable ore rocks, large production capacity, and high efficiency, and is also suitable for the mining of non-metallic deposits with filling methods. technical background [0002] The room-and-pillar upward horizontal layered filling mining method is currently a commonly used green mining method with low loss and good operational safety. However, because this mine method uses two-step mining, that is, the mining room is mined first, and then the mining pillar is used. In the mining process of the ore house, the blasting damage and cutting of the ore pillar are greatly affected by the mine house, resulting in damage to the rock mass of the ore pillar and a decrease in stability, and the mining condition o...

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Problems solved by technology

[0002] The room-and-pillar upward horizontal layered filling mining method is currently a commonly used green mining method with low loss and good operational safety. However, because this mine method uses two-step mining, that is, the mining room is mined first, and then the mining pillar is used. In the mining process of the ore house, the blasting damage and cutting of the ore pillar are greatly affected by the mine house, resulting in damage to the rock mass of the ore pillar and a decrease in stability, and the mining condition of the ore pillar is extremely deteriorated; in addition, the strip-shaped (thick) And the isolated ore pillar surrounded by the filling body adopts a bottom-up mining sequence. After the bottom is exposed, it can be fully supported by the cohesive force of the filling body on both sides, the tensile stress of the rock layer itself, and the cantilever beam of the upper and lower rock layers. When the suspension height of the ore pillar is too large and the tensile strength of the rock layer is not enough to overcome its self-weight stress, it may cause the entire ore pillar to sink or fall off in a large area, resulting in major safety accidents; In the condition of the suspended roof, the number of joints and fissures in the rock strata increases, and the local instability evolves into the overall instability, resulting in increased safety costs and the possibility of accidents.

At present, more and more mines are mined by the upward layered filling mining method in thick and large ore bodies in my country. When the ore pillars are mined, there are frequent stope roof caving, lack of support means, difficult mining in the stope and frequent safety accidents. The situation seriously affects the mine production and mining progress, and the resource loss rate is greatly increased, which is not conducive to the safe production of mines.

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