Mining method for hanging wall surrounding rock broken inclined medium thick orebody
A mining method and thick ore body technology, which is applied in ground mining, mining equipment, underground mining, etc., can solve the problem of difficult support for the roof of the surrounding rock on the upper wall, large open space of medium and deep hole blasting, and large hidden dangers of operation safety, etc. problems, to achieve the effect of solving ventilation safety problems, stabilizing the ore body, and reducing cost investment
Inactive Publication Date: 2018-10-02
CENT SOUTH UNIV
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[0003] For the current mining of inclined and medium-thick ore bodies, the more successful mining methods at home and abroad include the segmented room-and-pillar room method, the comprehensive method of ore retention, the upward horizontal layered approach mining method, and the high-section mine room method for explosive ore transportation. The caving method, anchor-mesh support without pillar sub-section caving method, etc. Among them, the filling method and the subsequent filling method are widely used. The caving method is not allowed to be used in many mines and has great limitations. In addition, due to production safety and production efficiency , mining cost and various technical and economic indicators are directly related to the stability of ore body and surrounding rock, ore value, ore body size and dip angle. Problems such as low efficiency and high hidden dangers in operation safety
[0004] Domestically, fo
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[0029] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0030] see Figure 1-Figure 4 , the diagram is a schematic diagram of the internal structure of the mining area adopting a mining method of the present invention for the mining method of the broken and inclined medium-thick ore body of the hanging wall surrounding rock, and the specific mining implementation steps are as follows:
[0031] Step 1) Divide the ore body into stopes along the strike of the ore body 12, the true thickness of the hanging wall pillar 8 reserved in each stope is 1-1.5m, and the thickness of the stope is the thickness of the ore body excluding the reserved hanging wall pillar 8 After the true thickness, stope length is set to 15 ~ 20m. During the mining process, the method of mining every other stope is adopted, and the transportation is carried out in stages, and the stage is divided into sections. The height of the st...
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Abstract
The invention discloses a mining method for a hanging wall surrounding rock broken inclined medium thick orebody. Stope division is carried out on the orebody along the orebody trend, broken ores aretransported in stages, subsections are divided within the stages, sublevel drift mining method is adopted in advance for stoping and filling of the orebody close to the hanging wall, the drift too plates of at one ends of all sublevel mining drifts close to a heading wall are interconnected to form a slope, thus making preparations for trench ore-drawing and enabling trench ore-drawing at all subsections, then a bottom-up stoping sequence is employed for stoping and filling of each subsection orebody, thereby effectively solving the problem of potential safety hazard when a carry scraper enters a stope for a long time. In addition, implementation of downward fan-shaped medium-deep holes improves the rock drilling efficiency and safety, all construction guarantees no destruction to the hanging wall broken surrounding rock, also a rock drilling gallery is employed as the air-return way, and the problem of difficult ventilation is effectively solved. The method provided by the invention generally shows significant security measures in ore drawing, rock drilling and ventilation of middle-low grade hanging wall surrounding rock broken inclined medium thick stable orebodies.
Description
technical field [0001] The invention belongs to the field of mining engineering, and in particular relates to a mining method for crushing and inclined medium-thick ore bodies in hanging wall surrounding rocks. Background technique [0002] Medium-low grade inclined medium-thick ore bodies have always had technical problems that are difficult to recover in safe and efficient mining. This is a major problem both at home and abroad, and this type of ore body has a large proportion of many metal mines in my country. [0003] For the current mining of inclined and medium-thick ore bodies, the more successful mining methods at home and abroad include the segmented room-and-pillar room method, the comprehensive method of ore retention, the upward horizontal layered approach mining method, and the high-section mine room method for explosive ore transportation. The caving method, anchor-mesh support without pillar sub-section caving method, etc. Among them, the filling method and th...
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Login to view more IPC IPC(8): E21C41/22E21F15/00
CPCE21C41/22E21F15/00
Inventor 陶明马敖洪志先刘志祥赵明生赵华涛
Owner CENT SOUTH UNIV
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