Steady transition method in the middle section of sub-pillar caving mining
A technology of segmental caving method and conversion method, which is applied in the field of stable conversion method in the middle segment of mining by segmental caving method without pillars, which can solve the problems of low production efficiency and decline of ore supply capacity, and achieve the effect of improving the overall benefit
Active Publication Date: 2016-06-01
CHINA HUAYE GROUP
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[0010] In view of the above-mentioned problems, the purpose of the present invention is to provide a method for stable transition in the middle section of mining by sub-pillar caving method, so as to solve the problem of ore supply capacity decline, Low production efficiency and other issues
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[0023] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0024] figure 1 It shows a schematic diagram of a method for smooth transition in the middle section of mining by the pillarless sub-level caving method according to an embodiment of the present invention.
[0025] exist figure 1 In the shown embodiment, in the mining process of the mine using the sectional caving method without bottom pillars, the +50m section is the unmined section of the upper middle section, the +35m section is the transportation level of the upper middle section, and the +5m section For the middle section of the lower middle section. In the process of adjusting and converting from the upper middle section to the lower middle section, the stope chute 3 in the lower middle section is extended to the section stope at the bottom of the upper middle section. The method of developing and constructing the lower and middle sec...
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The invention provides a stable middle section conversion method of a sill pillar-free sublevel caving mining. The method comprises the steps: when an upper middle section mining stope draw shaft is shortened to the preset parameter, extending a lower middle section mining stope draw shaft to an upper middle section stope; when the lower middle section mining stope draw shaft extends to the upper middle section stope, carrying out ore body lower plate boundary prospection in the lower middle section development construction; and confirming the intermediate subsections of the lower middle section and the positions of the stope draw shafts. After the stable middle section conversion method of the sill pillar-free sublevel caving mining is adopted, the problem of ore production reduction caused in the middle section conversion period in the sill pillar-free sublevel caving mining can be solved.
Description
technical field [0001] The invention relates to the technical field of mine mining, and more specifically, relates to a method for stable transition in the middle section of mining by the sub-section caving method without bottom pillars. Background technique [0002] At present, in the mining of large and medium-sized underground mines at home and abroad, the sub-level caving mining method without pillars is mostly used. This mining method generally divides the mine into several mining middle sections from top to bottom, and then divides multiple mining segments in each mining middle section. Among them, a number of independent stope chutes are set in the middle section of the mining, and the multiple stope chutes respectively lead to each section of the middle section, and are used for segmental mining, cutting and back mining rock to slide down to the bottom level of the middle section, so generally A track transportation system is horizontally installed at the bottom of ...
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IPC IPC(8): E21C41/16
Inventor 李海亮吕保李振林杜兴光
Owner CHINA HUAYE GROUP