63results about How to "Speed up mining" patented technology

The invention discloses a large efficient screening-type double-toothed roll crusher provided with a distribution device. The double-toothed roll crusher comprises a crushing device and the distribution device. The crushing device comprises a crushing drive motor, a fluid coupling, a reducer, a double-drum gear coupling, a crushing box, a base support, a left toothed roll, a right toothed roll and a lubricating grease pump, wherein the crushing drive motor, the fluid coupling, the reducer and the double-drum gear coupling form two sets of crushing drive units; and the two sets of crushing drive units are connected wit the left toothed roll and the right toothed roll inside the crushing box respectively. The distribution device comprises a distribution chute, an adjustable distribution stick, a movable connecting bracket, a distribution seat and a fixed connecting bracket, wherein the fixed connecting bracket and the distribution seat are fixed on the crushing box of the crushing device, the distribution chute is fixed at a discharge port of a material output belt machine head, and the distribution chute is connected with the crushing box through the movable and fixed connecting brackets. According to the large efficient screening-type double-toothed roll crusher, the problems of capital investment, equipment movement and the like of crushing equipment combined by a plurality of devices are solved fundamentally, the labor intensity of daily equipment maintenance is reduced, and the mining of surface mine materials is accelerated.

Provided is a gas-liquid-solid three-phase coupling blasting weakening rock burst and permeability increasing method. By coal seam water injection and changing of a powder charge structure of traditional blasting, common gas-solid two-phase blasting is converted into gas-liquid-solid three-phase blasting. Blast wave in water, jet flow, secondary pressure wave and other effects are generated by water pressure blasting to enhance blasting effect, after drilled holes are formed, coal bodies are wetted through water injection firstly, physical and mechanical properties around the drilled holes are changed, the gas-solid two-phase coal bodies are converted into gas-liquid-solid three-phase media, a stress concentrating zone is pushed to the deep parts of the coal bodies, stress concentration is lowered; coal seam fractures around blasting holes and in an influence zone are stretched and developed, the fractures are communicated with each other, a facture network is formed, stress concentration is removed, channels are provided for coal seam pressure relief gas flow, and accordingly the purpose that rock burst and gas outburst are prevented is achieved.

The invention relates to a method for cutting and pre-breaking top coal to improve mining efficiency by utilizing water power, which solves the problem that a relatively hard and complete roof coal seam, particularly a coal seam tightly attached to an upper rock body, is difficult for top coal caving, large in coal falling lumpiness and not high in mining efficiency. The method comprises the following steps of: drilling advanced boreholes in a roof coal body to a coal rock boundary surface on a mining working surface by utilizing a drilling machine; extending a high-pressure water pipe in the boreholes; and cutting a plurality of subhorizontal semicircular transverse slots by utilizing the impact force of high-pressure water from top to bottom in the top coal. A plurality of yielding regions are formed by the boreholes in linear distribution in the roof coal body, the mechanical conditions in the coal body are changed, the hard and complete coal body is promoted to be deformed and broken under the effect of advanced concentrated stress, and a plurality of cracks are generated; the coal-rock and coal-coal contact areas are reduced through the transverse slots, and the coal body on the boundary surface is further extruded under the effect of roof high stress, so that the coal body is broken, the adhesive power is lost, manual layering is achieved, and coal is convenient to fall. The method is simple and quick, high in operability and good in timeliness, the coal mining speed can be efficiently increased, and the mining efficiency of the top coal is improved.

The invention belongs to a uranium ore exploration method, and particularly relates to a combined prospection method for predicting the uranium ore body burial depth. Specifically, the method includes the following steps of determining measuring positions in a measuring area, measuring the content of ground gamma energy spectrum uranium at the measuring positions, measuring the content of instantaneous soil radon gas at each measuring position, taking soil samples at the measuring positions, airing, pulverizing and screening the soil samples, drying the soil samples, using agentia to extract component uranium in the dried soil samples, measuring and determining the extracted adsorbed state component uranium, making a plane contour map, circling an abnormal area, and predicting the uranium ore body burial depth according to abnormal combination conditions of the energy spectrum uranium, the instantaneous soil radon gas, the component uranium, the instantaneous soil radon gas / energy spectrum uranium ratio, the component uranium / energy spectrum uranium ratio and the component uranium / instantaneous soil radon gas ratio. According to the method, the misering workload can be greatly reduced, the prospecting hit rate is improved, and cost is reduced.