Wall column type upward horizontal layered filling mining method

Abstract

The invention discloses a wall column type upward horizontal layered filling mining method which is suitable for stoping low-grade thick and large ore bodies with medium ore stability and above and unstable surrounding rocks. The method comprises the following steps that an ore body is divided into stopes in the strike direction; the stopes are divided into stoping working faces perpendicular to the strike direction of the ore body and numbered in sequence, wall columns are reserved between the stoping working faces, stoping is carried out in a layered mode from bottom to top, and in order toguarantee stability of the wall columns, the stoping working faces on the two sides of the wall columns are not stoped simultaneously; stoping is carried out on the layered inner stoping working facesin two steps, odd stoping working faces are stoped and filled in the first step, and even stoping working faces are stoped and filled in the second step; and during working face stoping, a drill jumbo is adopted for constructing horizontal shallow holes, a nonelectric millisecond nonel detonator is adopted for detonation, caved ore is shoveled out through a carry-scraper and unloaded into an outside-vein draw shaft, and after working face stoping is completed, a filling retaining wall is constructed and filled. The method has the advantages of being large in stope production capacity, high inefficiency, small in supporting amount, low in filling cost and the like.

Description

technical field [0001] The invention belongs to the field of underground mining, and in particular relates to a pilaster-type upward horizontal layered filling mining method, which is especially suitable for the mining of low-grade thick ore bodies with moderately stable ore and unstable surrounding rocks. Background technique [0002] The upward horizontal layered filling mining method is a common method in the filling mining method. It is characterized in that the mine section is divided into upper layered layer-by-layer mining and filling, and personnel and equipment are used for mining operations under the ore roof. As the working floor, the caving ore is shoveled to the stope chute by a small scraper. Its main advantages are: ① It can be mined according to the shape of the ore body, reducing the mixing rate of waste rock, improving the grade of ore, high recovery rate, and small loss. The mixing of waste rock can greatly reduce the dilution loss of ore; ②It can realize...

AI Technical Summary

Problems solved by technology

However, for low-grade thick and large ore bodies, the conventional upward horizontal layered filling mining method also has the following problems: (1) The amount of support in the stope is large and the cost of support is high

For thick and large ore bodies, the current upward horizontal layered filling method is usually divided into mines and pillars for mining in two steps. Since the two-step ore pillars are mined with filling bodies on both sides, it is necessary to recover the first-step mine. High-strength cemented filling body is used for filling, and the proportion of high-strength cemented filling is large, and the cost of filling in the stope is high; (3) when the first-step mine is mined, the two sides are the original rock, and the safety conditions are good, but when the second-step ore pillar is mined, two The side is the filling body, and at the same time, affected by the blasting vibration of the stope in the first step and the bleeding of the filling body, the safety conditions of the second-step pillar mining deteriorate and the safety risks increase

[0003] For this reason, the present invention provides a pilaster type upward horizontal layered filling mining method, which aims to solve the problem of using conventional upward horizontal layered filling mining methods for low-grade thick ore bodies with moderately stable ore and unstable surrounding rocks. The problems faced by the above-mentioned stope support method are heavy workload, high cost of stope filling, and poor safety of stope recovery in the second step.

Images