Mine Static Fragmentation Agent and Its Application Method
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A static, mine-used technology, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problem that there is no report on the preparation and use of static fragmentation agents, and achieve the effect of convenient and safe storage and use
Active Publication Date: 2015-10-07
SHANDONG HUASHUO ENERGY SCI & TECH CO LTD
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Problems solved by technology
At present, there is no report on the preparation and use of the static cracking agent required for mine coal mining.
Method used
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[0024] The size of the coal seam is 50.0cm×30.0cm×20.0cm, the hole diameter is 3.0cm, the hole distance is 17.0cm, the hole depth is 16.0cm, the radius of the concentric circles of the holes is increased by 20.0cm, design 5 holes, and implement according to the experimental steps. Results The initial temperature of the static cracking agent was measured to be 24°C, the action time was 26 minutes, and the pressure generated by the experiment was 37.2 MPa.
[0027] The size of the coal seam is 100.0cm×50.0cm×50.0cm, the hole diameter is 4.0cm, the hole distance is 16.0cm, and the hole depth is 40.0cm. The radius of the concentric circles of the holes is increased by 20.0cm. 13 holes are designed and implemented according to the experimental procedures. , As a result, the initial temperature of the static cracking agent was measured to be 25°C, the action time was 25 minutes, and the pressure generated according to the experimental measurement was 45.4MPa.
[0030] The size of the coal seam is 130.0cm×100.0cm×100.0cm, the hole diameter is 3.5cm, the hole distance is 16.5cm, and the hole depth is 86.0cm. The radius of the concentric circles of the holes is increased by 20.0cm. 31 holes are designed and implemented according to the experimental procedures. , As a result, the initial temperature of the static cracking agent was measured to be 25°C, the action time was 23 minutes, and the pressure generated according to the experimental measurement was 48.9MPa.
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Abstract
The present invention discloses a static fragmentation agent for mine, and a use method thereof. The static fragmentation agent comprises the following components, by mass, 71-82% of quicklime, 7-10% of cement, 2-4% of plaster stone, 6-12% of bentonite, and 2-4% of fly ash. During use, for a coal layer requiring crushing, a pore size is generally designed into 1.5-4 cm, a pore distance is 15-30 cm, and a pore depth is 75-90% of a thickness of the coal layer. The operation method comprises: uniformly mixing quicklime, cement, plaster stone, bentonite and fly ash according to the preset ratio, adding the obtained mixture into boreholes, and finally injecting required water into the boreholes, wherein the coal layer can be subjected to self-crushing within 15-60 min. With the present invention, noise, flying rocks, dust and toxic gases produced due to explosion can be effectively avoided, works can be performed under safe conditions, no explosive combustion component exists, and burning and impact can not cause affection; and an action time of the static fragmentation agent can be regulated according to the formula change, a production cost is low, transportation, storage and use are safe and convenient, and the static fragmentation agent is especially suitable for mines with characteristics of complex geological conditions and high gas content so as to provide prominent advantages.
Description
technical field [0001] The invention belongs to a non-explosive crushing technology, which can be used in mining, and is especially suitable for coal mines with complex geological conditions and high gas content, and has more outstanding advantages. Background technique [0002] Traditional coal mining techniques mainly include chemical blasting and manual mining. Traditional manual mining not only wastes a lot of manpower and material resources, is inefficient, but also affects the progress of the project, which does not meet the needs of modern mine operations. Chemical blasting is a high-speed chemical reaction that generates huge gas pressure on the charge hole wall to break the surrounding medium. The use of chemical blasting will generate huge gas pressure, accompanied by vibration, impact, noise, dust and other phenomena, directly or indirectly threatening the life safety of operators. In special operation areas, such as mines containing flammable and explosive gase...
Claims
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Application Information
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