A mining method for broken and inclined medium-thick ore bodies with surrounding rocks on the hanging wall

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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Problems solved by technology

[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, for stable ore bodies with high ore value and broken hanging wall rocks, in order to reduce the loss of dilution and ensure that the surface does not subside, the upward horizontal layering mining method is often adopted for high-grade ore bodies. The method has the problems of low production efficiency and high cost. If the upward horizontal layering mining method with low production efficiency is used for medium-low grade ore bodies, an important disadvantage is that the cost will increase significantly. The body has obvious advantages in solving the problems of low production efficiency and high cost. However, the empty area of ​​medium and deep hole blasting is relatively large, and it is difficult to support the roof close to the surrounding rock of the hanging wall after blasting. Safety has brought troubles, therefore, it is of great significance to solve the problem of safe and efficient mining of such ore bodies

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