39 results about "Ordovician" patented technology

The invention relates to a mine water overall treatment utilizing technology. Warm water in a mined out is utilized for space heat exchange, underground drainage drilling water contained in limestone formed in Ordovician is utilized for preventing dust underground, magmatic rock drainage drilling water is used as domestic water and underground sewage is utilized after treated. The invention solves the treatment difficulty of a large quantity of mines, avoids polluting the environment, and saves precious water resources.

The invention discloses a method for modification and construction of top of Ordovician limestone of mine based on kilometer directional drilling technique. The method comprises the following steps: the drilling work for grouting modification of the top of the Ordovician limestone of the mine is applied through a kilometer directional drilling machine, a hole is drilled nonlinearly along the layer, a layout form of drilling the hole can be one perforated hole and multiple intersected holes, and advance grouting is adopted. According to the method for modification of the top of the Ordovician, the problem of safety mining under the conditions of insufficient thickness and strength of a water resisting layer when performing coal mining above a confined aquifer. An Ordovician limestone karst development structure and a hidden rupture structure are blocked in a large scale without occupying coal mining or driving face, a permeable layer at the top of the Ordovician limestone is converted to a water resisting layer in a certain range, so that ore resources threatened by the confined water are released, driving and recovery can be applied under the environment, no or few water prevention (separation) coal pillars can leave, and the resource recovery rate is improved.

The invention discloses a method for preparing rhomb-shaped superfine calcium hydrogen carbonate from Weibei ordovician limestone. The method comprises the following steps: crushing, cleaning, drying and sieving Weibei ordovician limestone, so as to obtain 1.6mm-2.0mm particles; calcining the particles at 1000 DEG C for 60 minutes, so as to obtain high-activity lime; mixing the high-activity lime with water of 90 DEG C, so as to prepare 5.6wt% of a lime emulsion; adding the lime emulsion into a container, putting the container into an ultrasonic vibrator, adding sodium laurate into the container, introducing CO2 gas, stirring, and reacting at 20 DEG C; when the pH is decreased to 7, stopping the introduction of CO2, turning off the ultrasonic vibrator, and continuing to stir for 20 minutes; and filtering, washing, and drying and grinding solute, so as to obtain the superfine calcium hydrogen carbonate. The method has the beneficial effects that the Weibei ordovician limestone is taken as the raw material, a carbonization method is adopted, a crystalline-form control agent, namely sodium laurate is added before carbonization, a gas distributor and an ultrasonic technique are adopted during the carbonization, and the rhomb-shaped superfine calcium hydrogen carbonate with excellent performance and high added value is prepared.

The invention discloses a method for searching for and preventing mine water seepage of an Ordovician limestone mine field. The method comprises the following steps: drilling a first vertical well vertical to the ground in the center of a coal mine area by using a first drill bit, and stopping drilling and cementing the well until the depth of the vertical well is 8-12 m into bed rock; further drilling downwards by using a second drill bit, and stopping drilling and cementing the well until the second drill bit penetrates into a coal bed by 5-10 m; further drilling downwards by using a third drill bit slantly in multiple directions to form an inclined well, and horizontally drilling after the third drill bit enters Ordovician limestone; in the horizontal drilling process of the drill bit, searching an Ordovician limestone gap, and plugging the gap till the edge of the coal mine area. Compared with the conventional vertical-well drilling for grouting plugging, horizontal-well multi-branch plugging construction really reduces manpower investment, equipment investment, construction area and other investments; by the method, the problem of lower group coal mining can be safely and efficiently solved, the water blocking performance of each floor water-resisting layer is improved, and pressure mining is implemented; by the method, a lot of money for water control in coal mining can be saved and coal resources are further released.

The invention relates to a northern karst spring protection and water quality evolution simulation device. The northern karst spring protection and water quality evolution simulation device includes a water supply device, a seepage device and a spring water control device; a seepage column is a cylindrical structure which is arranged obliquely and simulates a monoclonal structure; the closed end of the seepage column is provided with a water outlet; the spring water control device is arranged at the water outlet; the seepage column is filled with a Cambrian-Ordovician limestone seepage medium; a plurality of pressure measuring openings and water taking openings are arranged at the side wall of the seepage column; the pressure measuring openings are respectively connected with a pressure measuring tube; the pressure measuring tubes are respectively provided with a valve; the water taking openings are respectively provided with a flow meter and a valve; the water supply device comprises a water bearing layer leakage recharge device and a rain water supply device; the side wall of the upper end of the seepage column is provided with an overflow opening; and the overflow opening is connected with an overflow bottle through a pipeline. With the northern karst spring protection and water quality evolution simulation device of the invention adopted, a northern karst spring water quality evolution process can be simulated, and karst spring water quality evolution laws can be explored, and a scientific basis can be provided for the formulation for spring protection measures.