4results about How to "Lower the water table" patented technology

The invention discloses a method for rapidly improving a plough layer soil structure of saline-alkali land, which relates to the technical field of agriculture and comprises the following steps: arranging a drainage foundation of a water-permeable concealed conduit, sampling and measuring soil above the water-permeable concealed conduit, including soil bulk density, water content, pH, EC value, SOC and TN content, calculating SOC reserve, determining the proportion of an improver according to a detection result, and determining the soil structure of a plough layer of the saline-alkali land according to the proportion. Performing deep ploughing and rotary tillage treatment, and uniformly applying a modifier; the method comprises the following steps: carrying out rapid fertilization treatment, applying gypsum, biochar, a high-carbon-based organic fertilizer and fulvic acid, carrying out drip irrigation or flood irrigation, planting green manure crops, covering plant straws, turning and pressing into soil, and integrally carrying out hidden pipe salt elimination and deep ploughing physical improvement, gypsum, biochar and high-carbon-based organic fertilizer chemical improvement, straw returning and green manure matched biological improvement. According to the method, through comprehensive measures, the soil structure is rapidly and effectively improved, fertility is improved, salinity is prevented from rising, healthy growth of crops is promoted, and sustainable utilization of the saline-alkali soil is achieved.

The invention belongs to the technical field of coal bed gas exploitation, relates to a self-energizing activated drainage gas recovery process, and introduces a self-energizing technology and a fracturing exploitation technology. In other words, before the self-energizing activator is injected, the fracturing technology is adopted to exploit the coal seam, high-pressure liquid or gas is injected into the coal seam, the coal seam is fractured, cracks are opened, and new cracks and channels are created. The self-energizing activator can increase the permeability of the coal bed, improve the pore connectivity, increase the release rate and collection efficiency of the coal bed gas, increase the quantity of the collected coal bed gas and reduce the waste of coal bed gas resources.

The invention discloses an efficient energy-saving combined drainage device and method for closing a tailings pond, and belongs to the technical field of mine tailings. The high-pressure water gun gully system comprises a drainage ditch, a drainage well and a sludge discharge pipeline, one end of the drainage ditch communicates with the drainage well, the other end of the drainage ditch is connected with an open water area, and the middle section of the drainage ditch communicates with an upstream deposition section of the open water area through the sludge discharge pipeline; the fishbone-shaped matts drainage structure comprises main drainage ditches and secondary drainage ditches, and the main drainage ditches and the secondary drainage ditches are arranged in a fishbone matts shape; the light well point dewatering drainage system comprises a water collecting main pipe and dewatering well pipes, and the water collecting main pipe is arranged in the arrangement direction of the dewatering well pipes. The problems that in an existing tailing pond closing project, the beach face bearing capacity is insufficient, the regional draining consolidation effect is poor, and a deep water-containing area is difficult to treat are solved. The beach face bearing capacity of the tailings pond is improved, the construction continuity is ensured, and the construction efficiency is improved.

The utility model discloses a rain and sewage diversion structure of a flood control ditch in a heavy metal pollution plot area. The rain and sewage diversion structure comprises the flood control ditch, an HDPE anchoring part, an HDPE impermeable film B and a water collecting well. A plurality of HDPE anchoring parts are fixedly connected to the inner wall of the flood control ditch, an HDPE impermeable film B is jointly pasted to the upper portions of the HDPE anchoring parts, and a gap between the HDPE impermeable film B and the inner wall of the flood control ditch is a water collecting ditch. A water collecting well is excavated in the low-lying position of the flood prevention ditch, and the water collecting ditch is communicated with the water collecting well. The HDPE impermeable film B is arranged on the inner side of the flood prevention ditch to prevent seepage water of the flood prevention ditch from flowing out of the external environment, the seepage water flows into the water collecting well through the water collecting ditch below the HDPE impermeable film B to be recycled, and rainwater flows away through the upper portion of the HDPE impermeable film B, so that rainwater and sewage diversion of the area is achieved, and the problems that the seepage water quality of the flood prevention ditch in the area becomes yellow, heavy metal exceeds the standard, and the flood prevention effect is poor are solved. And environmental pollution is caused.