961 results about "Gangue" patented technology

The invention relates to the technical field of soil remediation, in particular to a soil remediation formula optimization method based on solid waste raw material charcoal improvement, which comprises the following steps: acquiring a coal gangue powder material flow and a sludge material flow, respectively performing component detection on a soil sample set, the coal gangue powder material flow and the sludge material flow to obtain a component content report, performing multi-factor combination on the plurality of biochar, the plurality of microbiota and the plurality of enrichment plants to obtain a plurality of first initial raw material combinations; and constructing a plurality of unit soil remediation experiment groups based on the component content report, the plurality of first initial raw material combinations, the soil sample set, the coal gangue powder material flow and the sludge material flow, and performing a soil remediation experiment on the plurality of unit soil remediation experiment groups based on a preset test pause condition to obtain an optimal scheme. According to the invention, the formula optimization of targeted soil remediation can be realized by utilizing the charcoal, the coal gangue and the municipal sludge.

The invention belongs to the technical field of solid waste concrete, and discloses fireproof sound-insulation heat-preservation light-weight high-strength all-solid waste concrete and a preparation method thereof.The fireproof sound-insulation heat-preservation light-weight high-strength all-solid waste concrete is prepared from an all-solid waste fireproof cementing material, all-solid waste light aggregate, water and a functional additive; the all-solid-waste fireproof cementing material comprises an alkaline activator component and an active powder component, the alkaline activator component comprises red mud and carbide slag in a mass ratio of (1.5-2.5): 1, and the active powder component comprises granulated blast furnace slag and low-temperature activated calcined coal gangue powder in a mass ratio of (1.0-1.8): 1; the all-solid-waste lightweight aggregate comprises coarse aggregate and fine aggregate in a mass ratio of (1-1.5): 1, wherein both the coarse aggregate and the fine aggregate comprise high-temperature expanded and roasted coal gangue lightweight aggregate; wherein the low-temperature activated and calcined coal gangue powder is obtained by performing gradient temperature control calcination on coal gangue at 650-800 DEG C and then grinding the coal gangue until the specific surface area is greater than or equal to 500m < 2 > / kg; the high-temperature expanded and roasted coal gangue lightweight aggregate is obtained by roasting and expanding coal gangue at 1100-1300 DEG C and then screening and grading.

The invention relates to the technical field of building materials, and provides washing gangue concrete with high slump loss resistance and a mixing process thereof. The high-slump-retaining washed gangue concrete is prepared from the following raw materials in parts by weight: 200 to 220 parts of cement, 140 to 150 parts of mineral powder, 60 to 65 parts of fly ash, 680 to 720 parts of machine-made sand, 950 to 970 parts of washed gangue, 150 to 160 parts of water, 16 to 17.5 parts of a water reducing agent, 0.15 to 0.3 part of a slump retaining agent and 4 to 4.3 parts of polyethylene glycol. The slump retaining agent is hydroxypropyl methyl cellulose ether; and the viscosity of the hydroxypropyl methyl cellulose ether is 100 thousand mPa.s to 300 thousand mPa.s. According to the technical scheme, the problems of poor slump retaining performance and low compressive strength of washed gangue concrete in the prior art are solved.

A coal mine tunnel ditch cleaning system relates to the technical field of coal mine tunnel cleaning and comprises a walking system used for enabling the whole system to move in the extending direction of a ditch in a tunnel; the screening system is installed on the upper end face of the supporting plate, is close to the edge of the supporting plate in the advancing direction of the walking assembly and comprises a screening hopper elastically installed on the supporting plate, a screen plate is arranged in the screening hopper, and the bottom of the screening hopper communicates with a liquid discharging assembly; the feeding system is located on the outer side of the advancing direction of the walking assembly and used for conveying sundries and accumulated water in the ditch into the screening hopper. Compared with the defects that traditional manual cleaning is high in risk and low in efficiency, and a suction type ditch cleaning machine is stopped due to blocking of large gangues, the system achieves breakthrough through the integrated design of material digging and screening, a digging hopper of the feeding system rotates along with a transmission chain and can directly go deep into a ditch to dig deposits high in viscosity and mixed in component, and the problem that a suction opening is blocked is solved.

The invention relates to the technical field of architectural ceramics, in particular to a gangue-doped ceramic tile and a preparation method thereof.The gangue-doped ceramic tile comprises a green body layer, a ground coat layer, a decorative layer and a glazed layer which are sequentially arranged from bottom to top; the green body layer is prepared from the following raw materials in percentage by mass: 6 to 12 percent of bentonite, 1 to 5 percent of Qingshan soil, 3 to 6 percent of polishing mud, 6 to 12 percent of waste brick powder, 4 to 8 percent of green gangue, 5 to 15 percent of chinastone, 20 to 30 percent of feldspar, 1 to 3 percent of recycled blank material, 2 to 5 percent of snail mountain soil, 8 to 15 percent of sandstone, 3 to 6 percent of washed white mud, 5 to 15 percent of coal gangue and 2 to 5 percent of grey gangue; the chemical components of the polishing mud, the waste brick powder, the recycled blank material and the coal gangue respectively comprise SiO2, Al2O3, Fe2O3, TiO2, CaO, MgO, K2O and Na2O. According to the gangue-doped ceramic tile and the preparation method thereof, the raw materials of the green body layer are improved, so that the firing temperature is reduced, the firing period is shortened, low-temperature fast firing is realized, and meanwhile, the production cost is low, the antifouling property is excellent, and the strength is high.

The invention relates to the technical field of preparation of new materials for coal mine tunnel construction, in particular to a mining ultrahigh-strength sprayed concrete active admixture and a preparation method of the mining ultrahigh-strength sprayed concrete active admixture. The prepared UHPC has excellent jet constructability, rapid hardening performance and long-term durability, realizes nearby high-valued utilization of coal mine solid waste, solves the problems of low strength, high rebound rate and long maintenance period of a traditional roadway spraying material, can replace traditional guniting concrete to be used for rapid support construction and repair of a coal mine roadway, and has a wide application prospect. And the method has remarkable technical economic benefits and social benefits.

The invention discloses coal mine screening equipment for coal mining and a use method, and the equipment comprises a multi-source sensing module which is used for obtaining the original data of various physical characteristics of raw coal in real time; the data fusion and feature extraction module is used for extracting a fusion feature vector used for representing the key difference between the coal and the gangue; the decision-making unit is used for generating a sorting control instruction aiming at the current batch of raw coal in real time; the execution module is used for carrying out coal and gangue separation on the coal flow; the feedback module is used for feeding back clean coal product quality indexes and tailing data detected in real time to the decision-making unit; multi-dimensional information such as mineral components, moisture and lumpiness is fused through the multi-source sensing module, comprehensive analysis is carried out through the data fusion and intelligent recognition model, the limitation of a single sensing mode can be overcome, the recognition precision and reliability of coal and gangue are improved, efficient sorting is achieved from the source, and the recognition efficiency of coal and gangue is improved. The effects of improving the purity of a clean coal product and reducing the coal carrying rate of the gangue are directly achieved.

The invention belongs to the technical field of coal mine green mining and disaster prevention and control, and particularly relates to a caving area gangue grouting and filling method for recycling underground coal mine water resources. And zero emission and efficient cyclic utilization of water resources are realized. The coal gangue is used as a main filling aggregate and is directly digested underground, so that the problems of land occupation and environmental pollution caused by ground stockpiling are avoided, and harmless and large-scale treatment of the coal gangue is realized. A water treatment system and a gangue treatment system are combined into a whole, the comprehensive operation cost of a mine in the aspects of water disaster prevention and control, gangue treatment and outsourcing of a water source is remarkably reduced through a cyclic operation mode, and the cost benefit is high. Accurate detection and effect verification of the previous and later ponding areas are carried out through a geophysical prospecting means, and measures such as directional drilling and safety monitoring are combined, so that controllability and safety of the whole operation process are ensured, and the safety and reliability are high.

The invention discloses a fracturing proppant using coal gangue and fly ash and a preparation process thereof, and relates to the field of fracturing proppants, the fracturing proppant comprises coal gangue, fly ash, silica fume, nanometer alumina, a composite pore-forming agent and a fluxing agent, and the preparation process comprises raw material pretreatment, mixing granulation, microwave-gradient sintering and post-treatment. The raw material pretreatment comprises the following steps: removing iron and impurities through carbon thermal reduction-magnetic separation; the composite pore-forming agent is enriched on the surface of the green body during mixed granulation; the microwave-gradient sintering is used for cooperatively regulating and controlling growth of mullite crystals through microwave preheating and resistance heating to form an internal acicular mullite interlaced structure and a surface micro-convex structure; a finished product is obtained through post-treatment grading and surface cleaning. Resource utilization of industrial solid waste is achieved, the strength and flow conductivity of the proppant are improved through raw material synergy, crystal structure regulation and control and surface microstructure design, preparation energy consumption is reduced, and the proppant is suitable for oil and gas field fracturing engineering.

The invention provides a gold ore phase analysis method, and belongs to the field of mineral analys.The gold ore phase analysis method comprises the steps that a gold ore sample is prepared into ore pulp, the pH value is adjusted to 10-11, ultrasonic cavitation treatment is conducted after polyethylene glycol is added, and limonite turbid liquid and sedimentation bottom mud are obtained through separation; the turbid liquid is subjected to flocculation precipitation, drying, roasting, acid dissolution and impurity removal, and the limonite gold-loaded grade is obtained through the mass difference before and after dissolution and gold concentration determination; separating metal sulfide ore heavy minerals and gangue minerals from the settled bottom mud through artificial heavy elutriation, performing acid dissolution and impurity removal on the metal sulfide heavy minerals, and calculating the gold loading grade of the metal sulfide heavy minerals through mass difference and gold concentration determination; after gangue minerals are subjected to oxidizing roasting, the gold content is measured after concentrated acid dissolution; and calculating the distribution rate of gold based on the result. The gold loading grade and distribution of the limonite phase, the metal sulfide ore phase and the gangue mineral phase are measured in a split-phase mode, the method is highly matched with the gold ore development process, operation is easy and convenient, the result is reliable, and beneficiation and metallurgy technological process formulation and technical index pre-judgment can be effectively served.

The invention discloses a method for measuring the oxidation rate of silver ore, and relates to the technical field of mineral processing and process mineralogy analysis. The determination method comprises the following steps: preparing and segmenting a sample; silver grade calibration and reselection enrichment are carried out, and products with different mineralogical characteristics are obtained; carrying out automatic mineralogical analysis to obtain the type, content and dissemination characteristics of silver minerals; chemical leaching correction coefficient determination, wherein phase state distribution of silver is obtained through stepped chemical leaching, and the correction coefficient is calculated; determining a gangue wrapping correction coefficient, analyzing the silver content of the residue and calculating the correction coefficient; and finally, calculating the silver ore oxidation rate based on the automatic mineralogy analysis data and the correction coefficient. According to the method, through multi-technology fusion and data correction, the accuracy and reliability of measurement of the oxidation rate of the silver ore with low silver mineral content and uneven distribution are remarkably improved, and accurate data support is provided for formulation of a mineral separation process.

The invention relates to the technical field of suspension roasting, in particular to a flowing suspension roasting system and method for desiliconizing and purifying coal gangue. The system comprises a multi-stage preheating unit, a multi-stage cooling unit, a flowing suspension roasting furnace and a crystal form control device which are connected in sequence, and the method comprises the steps that coal gangue materials are subjected to multi-stage preheating, so that the materials are heated in stages; performing high-temperature roasting in a flowing suspension roasting furnace, and controlling the retention time of the material and the environment temperature in a crystal form control device so as to regulate and control the crystal form structure of the material. By accurately controlling the roasting process and optimizing material crystal form transformation, efficient removal of silicon in the coal gangue and efficient extraction of aluminum oxide are achieved, and the method has the advantages of being low in energy consumption, high in efficiency and good in environment friendliness and is suitable for large-scale industrial production.

The invention discloses an active treatment method for multi-source residual coal gas of a waste mine, which comprises the following steps: firstly, hydraulic fracturing pressure relief permeability improvement and overlying strata separation layer grouting reinforcement are cooperated, the hydraulic fracturing pressure relief permeability improvement establishes a netted fracture network in a coal body to realize permeability improvement, and the overlying strata separation layer grouting reinforcement compacts goaf gangue through grouting and reinforces an overlying strata to form a continuous bearing consolidation body; and therefore, a pressure relief and permeability increasing-strengthening and reinforcing integrated structure is formed, a stable structure and a penetrating seepage network are provided for subsequent displacement and gas extraction, and the subsequent gas extraction efficiency is guaranteed. Then low-temperature liquid CO2 is injected into the coal seam through the injection well, gas displacement and desorption are conducted on gas adsorbed in the coal seam under the action of phase change and competitive adsorption, expansion and development are conducted on fractures to enable permeability to be secondarily enhanced, and meanwhile part of CO2 obtained after displacement is retained and sealed in a coal body and a goaf; on the premise that the gas extraction concentration and efficiency are effectively improved, CO2 can be stored, and the dual effects of resource utilization and carbon storage are achieved.

The invention discloses a preparation method of a three-dimensional split-phase fancy glaze for coal gangue ceramic body decoration, the three-dimensional split-phase fancy glaze comprises a ground glaze and a cover glaze, the cover glaze comprises the following raw materials by weight: 15-20% of quartz, 10-15% of calcite, 5-10% of kaolin, 5-10% of zinc oxide, 10-15% of calcium phosphate, 25-30% of potassium feldspar, 2-5% of calcium borate, 5-10% of tin dioxide, 3-5% of spodumene, and 2-5% of a coloring oxide; the ground glaze is prepared from the following raw materials in percentage by weight: 15-20% of quartz, 10-15% of wollastonite, 5-10% of kaolin, 10-15% of zinc oxide, 15-20% of calcium phosphate, 15-20% of spodumene, 5-10% of titanium dioxide, 5-10% of calcium borate, 2-5% of coal gangue and 2-5% of coloring oxide, and the product is obtained through raw material preparation, glazing and sintering. The prepared three-dimensional split-phase fancy glaze is simple in process, high in adaptability, unique in effect and wide in market prospect.

The invention belongs to the technical field of refractory materials, and particularly relates to a mullite refractory material with high mechanical property and a preparation method thereof. The mullite refractory material is prepared by taking coal gangue, bauxite and fly ash as raw materials, and the three industrial solid wastes are converted into the refractory material with high additional value, so that the concept of circular economy is met. According to the invention, coal gangue, bauxite and fly ash are used as raw materials, CaF2, V2O5 and lanthanide rare earth oxide are used as sintering aids, the problems of insufficient mechanical properties and overhigh sintering temperature of the mullite refractory material prepared by purely using coal gangue, bauxite and fly ash as raw materials are solved, and the performance of the mullite refractory material can be greatly improved. CaF2 and V2O5 promote substance transport and grain growth, and rare earth oxide inhibits excessive growth of grains. The balance of'promotion 'and'inhibition' is favorable for forming a compact, fine, uniform and interlaced mullite crystal network, and meanwhile, the mullite crystal network has high strength and good toughness.

The invention provides a ceramsite proppant as well as a preparation method and application thereof. The method comprises the following steps: grinding a coal gangue raw material, pre-sintering, cooling and then grinding again; grinding the tungsten tailing sand, the low-grade bauxite, the carbide slag and the clay; grinding after mixing the raw materials; the raw materials comprise 45-60 parts of low-grade bauxite, 20-35 parts of pre-sintered coal gangue, 15-20 parts of tungsten tailing sand, 1-5 parts of carbide slag and 7-14 parts of clay; the total amount of the low-grade bauxite, the pre-sintered coal gangue and the tungsten tailing sand is 100 parts; granulating and drying; carrying out first sintering at 800-950 DEG C; second sintering is conducted at the temperature of 1050-1200 DEG C; and naturally cooling to obtain the ceramsite proppant. The technical problem to be solved is how to realize high-valued utilization of mine solid waste and low-grade bauxite, reduce dependence on high-quality bauxite and production cost, reduce sintering energy consumption and carbon emission, reduce product body density and improve key performance such as strength and sphericity of the proppant by optimizing raw material combination and a preparation process. And the requirements of oil and gas field fracturing operation are met.

The present application belongs to the field of coal mine roadway construction, and particularly relates to a method for self-forming a roadway by top cutting at a negative angle. The method comprises the following steps: drilling a field in front of a working face and close to a right side of a mining roadway; drilling anchor holes and top cutting holes along a strike and staggered construction, and installing grouting anchor cables in the field; cutting the basic roof and the immediate roof at a negative angle through the top cutting holes at the back of the working face, constructing a roadway-side gangue retaining structure, grouting through the grouting anchor cables and anchoring the grouting anchor cables on the roadway-side gangue retaining structure; and monitoring the deformation of the steel mesh at the grouting anchor cable and adjusting through a nut. The present application can ensure that the construction position of the roadway-side gangue retaining structure does not affect the width of the self-supporting roadway and the integrity of the roof by constructing a field of a certain width in advance. The negative angle top cutting holes can cut a section that is deviated to the direction of the goaf, so that the gangue formed by the collapse of the immediate roof moves to the direction of the goaf and does not move to the mining roadway in large quantities, thereby ensuring the safety of the construction in the mining roadway.

The present disclosure is directed to a method for forming calcined pozzolan that includes: performing a gravity separation on coal refuse to separate an organic component from an inorganic component including crystalline shale; and converting the crystalline shale to a calcined pozzolan. The present disclosure also directed to a calcined pozzolan, concrete, a method of producing concrete, and a method for cleaning a landfill site.

The invention provides an overlying strata separation layer grouting slurry reinforcing method and system, and the method is characterized in that after overlying strata separation layer grouting is completed by using coal gangue or fly ash in advance, ultrahigh-water material slurry with the water-cement ratio from high to low is injected into a separation layer space in a manner of gradient pressurization and first thinning and then thickening in a plurality of pressure increasing gradients. The system comprises a temporary grouting station and a double-liquid flow matching control system. According to the characteristics of the ultrahigh-water material, original loose slurry in the separation layer can be rapidly permeated and cemented, a stable supporting structure with gradually-changed strength is formed, cracks are effectively blocked, the slurry is prevented from running, leaking and emitting, the settlement reducing effect of overlying strata separation layer grouting is remarkably improved, and meanwhile the advantages of being low in cost, high in efficiency, environmentally friendly and capable of utilizing waste are achieved.

The invention discloses a method for treating gangue through paste-slurry combined filling under the condition of a cut-off type roof, which specifically comprises the following steps: obtaining the yield and particle size distribution of mine gangue according to a product balance table for guiding a paste filling system, an underground coal gangue separation system and a slurry filling system; filling spacing is dynamically adjusted according to the lithology of the roof, the filling spacing is determined by controlling the number of intervals of the supports, it is guaranteed that a paste roof-contacted supporting roof rock stratum collapses, and a stable slurry filling space is constructed; gangue in a ground gangue bin enters a slurry filling system and automatically flows to a slurry pump to be pumped to the position above a working face along a filling pipeline, vertical drilling is constructed in an underground goaf to the position above a slurry filling space, and the filling pipeline is arranged to complete filling; the large-scale disposal of all gangues above and below the mine is completed according to continuous and sequential circulation of mine excavation. By means of paste-slurry filling combined operation, all underground filling treatment of underground gangue solid waste of the million-ton level is achieved, support to a top plate is reinforced through paste-slurry combination, and mine pressure is effectively weakened.

The invention belongs to the technical field of cement production line transformation, and discloses a method for transforming a cement clinker production line into a coal gangue suspension calcination production line, the cement clinker production line comprises five stages of double-series preheaters and a decomposing furnace, the five stages of double-series preheaters are divided into A-row preheaters and B-row preheaters, a preheater in the column A is transformed into a preheating device of the coal gangue powder suspension calcination production line, a preheater in the column B is transformed into a gas-solid separation cyclone and a cooling device of the coal gangue powder suspension calcination production line, and a pipeline furnace is arranged between an air outlet of a decomposing furnace and an air inlet of the gas-solid separation cyclone. A decomposing furnace and a pipeline furnace are jointly transformed into a coal gangue suspension calcining furnace. According to the method, an obsolete cement clinker production line is transformed into a coal gangue suspension calcining production line with the working procedures of coal gangue grinding, conveying, metering, preheating, calcining, cooling and the like.

The invention discloses a solid-waste-based grouting material for mine roof contact filling and a preparation method. The solid-waste-based grouting material comprises 30-44 parts of steel slag powder, 25-39 parts of fly ash, 8-15 parts of desulfurized gypsum, 10-24 parts of activated coal gangue powder and 13-18 parts of an alkali activator. The mass ratio of the alkali activator water glass to the sodium hydroxide is 1.5-2.5; the content of free calcium oxide f-CaO required by the steel slag powder is lt; the specific surface area is greater than or equal to 700m < 2 > / kg; the activated coal gangue powder is prepared by calcining coal gangue at 650-750 DEG C for 1-2 hours, removing organic matters and activated silicon-aluminum components, and grinding until the specific surface area is greater than or equal to 500m / kg. The fluidity of the obtained material is 260-310 mm, the 3d compressive strength is larger than or equal to 7.2 MPa, and the 28d shrinkage rate lt is achieved; the solid waste utilization rate is greater than or equal to 90%, and the cost is reduced by more than 35% compared with that of the traditional material. The material is used for mine filling roof contact, has the characteristics of good fluidity, rapid hardening, appropriate early strength, excellent volume stability, environmental friendliness and low cost, and has wide application prospects.

The invention relates to the technical field of coal gangue activation, and discloses a coal gangue activation process optimization method and system for preparing a cementing material and filling aggregate, and the method comprises the following steps: carrying out crushing, screening and sorting pretreatment on a coal gangue raw material; the pretreated coal gangue particle material is subjected to physical synergistic activation; carrying out chemical compound activation on the coal gangue particle material subjected to physical activation; sampling and detecting the coal gangue particle material subjected to composite activation; an artificial intelligence large model is constructed to analyze detection data, the activation degree is quantitatively evaluated, and the performance strength is predicted; and dynamically generating an optimization instruction aiming at preparation process parameters, and preparing the cementing material and the filling aggregate. The activation efficiency and product performance of the coal gangue are improved, high-added-value resource utilization of the coal gangue is achieved, and an effective technical support is provided for large-scale consumption of the coal gangue and development of green building materials.

The invention relates to the field of deep coal bed gas development and reservoir reconstruction engineering, in particular to a compressibility evaluation method for a deep coal bed gas reservoir containing dirt band. The invention discloses a method for evaluating compressibility of a deep coal bed gas reservoir containing dirt band. The method comprises the following steps: obtaining a normalized coal rock brittleness index, a normalized coal body structure index, a normalized fracture toughness index, a normalized ground stress heterogeneity index, a normalized dirt band and coal rock layer stress difference index, a normalized fracture surface density index and a normalized mechanical specific energy index; converting the data into dimensionless numerical values, and unifying the value range to an interval of [0, 1]; and performing hierarchical weight assignment by using a triangular fuzzy analytic hierarchy process to form a deep coal rock compressibility index, and establishing an evaluation standard according to the deep coal rock compressibility index. According to the method, a theoretical basis is provided for optimal decision-making of the on-site deep composite coal rock reservoir fracturing transformation horizon.

The invention discloses a coal composition and gangue rapid identification method in an intelligent coal dressing process, and relates to the technical field of photoelectric detection. The method comprises the following steps: acquiring an original spectral signal and a belt background spectrum, and preprocessing and calibrating the original spectral signal to obtain a current material spectrum; whether belt background interference exists in the current material spectrum or not is judged through spectrum similarity calculation, if the belt background interference exists, a belt signal proportion coefficient alpha is obtained through quantification based on a preset linear spectrum mixing method, and a belt background existence mark is set to be true; the alpha is compared with a preset interference threshold value, when the alpha is higher than the interference threshold value, spectrum background correction is carried out on the current material spectrum, and a corrected material spectrum is obtained; interference of belt reflection on material spectrums can be effectively eliminated, real spectral characteristics of the thin coal seam are completely recovered, and coal resources are prevented from being mistakenly eliminated as gangue.

The invention discloses an ecological restoration matrix for a mining area as well as a preparation method and application of the ecological restoration matrix. The ecological restoration matrix for the mining area comprises the following components in parts by weight: 30-50 parts of modified coal gangue, 20-35 parts of decomposed straws, 10-20 parts of bentonite, 8-15 parts of zeolite powder, 5-12 parts of charcoal, 0.5-2.0 parts of a compound microbial agent, 1-3 parts of a water-retaining agent and 0.3-1.0 part of an organic acid chelating agent. The invention further discloses a preparation method and application of the ecological restoration matrix for the mining area. The ecological restoration matrix for the mining area realizes balance of heavy metal passivation and plant nutrient absorption, unification of physical structure stability and water retention and air permeability, and coordination of rapid soil formation and long-term sustainability. The method is simple in process, low in cost and suitable for industrial application.

The invention relates to a solid-waste-based curing agent and application thereof. The solid-waste-based curing agent comprises metal smelting solid waste, alkaline solid waste and coal-based solid waste according to the mass ratio of (4-7): 2: (1-2.5). The metal smelting solid waste is slag and / or steel slag; the alkaline solid waste is carbide slag; the coal-based solid waste is fly ash and / or coal gangue. According to the invention, common industrial solid wastes are utilized, and through mixing ratio adjustment and proper addition of a small amount of appropriate additives, the application scene requirements of various mucky soil flow state solidification such as foundation pit, comprehensive pipe gallery and pipe groove backfilling, mine and tunnel goaf backfilling, roadbed and pavement base filling, soft foundation treatment and the like can be met.

The invention belongs to the technical field of coal mining, and particularly relates to a key parameter design method for targeted grouting and filling pier stud water-preserved coal mining. The method comprises the steps that mine hydrogeology and mining geology data are collected, and the burial depth, the thickness, the physical and mechanical parameters and the gangue breaking and expanding coefficient of a coal rock layer are obtained; adopting discrete element numerical simulation to determine the caving zone height under the insufficient mining critical propulsion length; the drilling depth of the grouting drill hole and the caving zone void ratio are calculated; preparing and testing the mechanical strength and diffusion stacking angle of the grouting material in a laboratory; combining the critical coefficient of insufficient mining, applying a rock stratum subsidence probability integral method, and scientifically designing the interval, the radius and the grouting amount of filling pier columns; and finally, cement pier columns are formed in a caving zone through ground drilling and grouting, an overlying rock stratum is stably supported, and structural deformation of the aquifer is controlled. The method is simple in parameter design and high in accuracy, and space-time interference of a traditional filling process is avoided.

The invention discloses a solid waste-based mine filling composite material and application thereof in a separation layer filling treatment system. The composite material is prepared from the following components in percentage by mass: an aggregate component: 30-60% of coal gangue fine powder; a gelling component: 10%-25% of desulfurized gypsum; an activator component: 5%-15% of an alkali activator; and auxiliary components: 5%-15% of fly ash and 0.5%-2% of an early strength water reducing agent. According to the solid-waste-based mine filling composite material and the application of the solid-waste-based mine filling composite material in a bed separation filling treatment system, industrial solid waste is used as a main raw material, an optimized composite system is constructed, and through the synergistic effect of all the components, good balance of slurry fluidity, setting time and early strength is achieved; the obtained slurry has excellent pumpability and stable diffusivity, can effectively permeate and fill separation cracks, is controllable in setting and hardening time, meets the requirements of different engineering scenes, and realizes efficient and high-valued utilization of solid waste resources.

The invention discloses a coal mine gangue solid filling deformation bearing regulation and control method. The method comprises the following steps that deformation bearing indexes of a filling body are determined according to different filling control targets; the method comprises the following steps: acquiring a field gangue filling material, and acquiring physical and mechanical characteristics of gangue and an influence rule of different particle size gradation, lithology and compactness on deformation characteristics of a gangue filling body through an experimental means; selecting one kind of lithologic gangue, and determining discrete element simulation microcosmic parameters by adopting a trial-and-error method; the size of a large-scale numerical model and the gangue particle size range are determined by considering the actual working face size, the gangue lateral confinement compression stress deformation characteristics under the engineering scale are simulated, and the stress-strain relation is fitted according to the stress deformation characteristics. According to the on-site gangue compaction degree and the characteristics of the memory effect of gangue, the fitting curve is translated leftwards to obtain a gangue stress-strain fitting curve under the tamping effect of the filling support, numerical simulation under the engineering condition is conducted through a translated fitting formula, and gangue filling parameters are regulated and controlled according to the simulation result. Experiments, scale effect correction and numerical simulation are organically combined, test operation is easy and convenient, the bearing performance of the filling body is accurately regulated and controlled, the method is suitable for various complex mining scenes, regulation and control efficiency is high, adaptability is high, and reliable technical support is provided for green filling coal mining.