Coal mine underground deep hole blasting charging method

Abstract

The invention discloses a coal mine underground deep hole blasting charging method, and relates to the technical field of mine blasting. Due to the fact that when deep hole blasting construction is conducted under a coal mine, in an original charging method, an anchor cable of 30 m is originally adopted to push explosive cartridges with the length of about 50 cm to the bottom of a hole section by section in the charging process, operation is quite complex and low in efficiency, time and labor are wasted, and the labor cost is high, the coal mine underground deep hole blasting charging method is invented. According to the method, the coal mine underground deep hole blasting charging device is designed, and the charging device is simple in structure and easy and convenient to operate. By means of the method and the explosive charging device, the explosive charging process is safer, more convenient and more efficient, the labor intensity of workers is greatly reduced, the working efficiency is improved, meanwhile, in the method, drilling equipment is fully utilized, the explosive charging quality is guaranteed, the blasting effect is improved, safety in the construction process is also guaranteed, and the method has great significance in guiding safety production for subsequent coal mine production design.

Description

technical field [0001] The invention belongs to the technical field of mine blasting. Specifically, a coal mine underground deep-hole blasting charge device is designed. The special structure of the charge device can safely support and transport explosive rolls. The drill rod connection of the hole drilling rig can use the deep hole drilling rig to control and push the drill rod to send the explosive charge to the bottom of the blasting hole, realizing the charging process of the deep hole blasting in the coal mine, thus forming a simple, fast, efficient and safe charging method. It is suitable for roof deep hole blasting in underground coal mines or roof deep hole blasting in non-coal mines. Background technique [0002] In deep hole blasting in coal mines, most of them are for roof caving and pressure relief. According to the thickness of the old roof of the coal seam, the depth of the blasting hole is generally about 25-30m. The traditional drilling construction uses a dr...

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Problems solved by technology

[0002] In deep hole blasting in coal mines, most of them are for roof caving and pressure relief. According to the thickness of the old roof of the mined coal seam, the depth of the blasting hole is generally about 25-30m. The traditional drilling construction uses a 75mm diameter drill car for construction. , the traditional charging method is to use a nearly 30m long anchor cable to push the explosive rolls with a length of about 50cm into the bottom of the hole one by one. Because the 30m anchor cable is very heavy, the construction labor intensity of the workers is huge, and the total length of the charge Longer and more times of feeding, resulting in very low work efficiency, sometimes due to the deformation of the drilled hole or partial hole collapse, hole blocking, etc., it is difficult for workers to push the explosive roll to the bottom of the hole when charging, resulting in poor blasting effect. good

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